{"title":"Carburetor Springs","description":null,"products":[{"product_id":"vacuum-secondary-tuning-kit","title":"Advanced Engine Design Vacuum Secondary Tuning Kit — Holley Carburetor Spring Set (7-Piece)","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Advanced Engine Design\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eAdvanced Engine Design engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Advanced Engine Design lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/lgssCtLClFo\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eMaster Your Holley's Power Band with the AED Vacuum Secondary Tuning Kit\u003c\/h2\u003e\u003cp\u003eUnlock the full power and efficiency of your Holley carburetor with the \u003cstrong\u003eAdvanced Engine Design Vacuum Secondary Tuning Kit\u003c\/strong\u003e. This essential 7-piece spring set allows you to precisely control when your carburetor's secondary barrels open, ensuring optimal air-fuel mixture and maximum horsepower across your engine's RPM range. Improper secondary engagement can lead to a sluggish top-end or an overly rich condition, but with this kit, you gain the control to dial in your carburetor for peak performance.\u003c\/p\u003e\u003ch3\u003ePrecision-Engineered Springs for Optimal Engagement\u003c\/h3\u003e\u003cp\u003eEach spring in this kit is crafted from durable steel and color-coded for easy identification, representing different tension rates. By swapping out your vacuum secondary spring, you can fine-tune the delay and rate at which the secondary throttle plates open. A lighter spring will open the secondaries sooner, ideal for lighter vehicles or engines that build vacuum quickly, while a heavier spring delays engagement for heavier vehicles or engines that require more time to reach their power band. This adjustability is critical for maximizing both drivability and wide-open throttle performance.\u003c\/p\u003e\u003ch3\u003eKit Contents \u0026amp; Tuning Benefits:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e7 Color-Coded Springs:\u003c\/strong\u003e A comprehensive range of tensions for precise secondary tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Power Delivery:\u003c\/strong\u003e Ensures secondaries open at the ideal RPM for maximum horsepower.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Fuel Economy:\u003c\/strong\u003e Prevents premature secondary engagement for better cruising efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Drivability:\u003c\/strong\u003e Eliminates flat spots and provides a smoother transition into the power band.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Steel Construction:\u003c\/strong\u003e Built to last and maintain consistent tension.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Key to a Perfectly Balanced Carburetor\u003c\/h3\u003e\u003cp\u003eThe vacuum secondary system is a crucial component for balancing street manners with high-performance demands. With the Advanced Engine Design Vacuum Secondary Tuning Kit, you have the tools to achieve that perfect balance, ensuring your Holley carburetor delivers power smoothly and efficiently. This kit is a must-have for anyone looking to extract the absolute best performance from their Holley setup. Find your ideal secondary spring at GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Advanced Engine Design products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/350-500cfm-holley-renew-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design Holley 2300 Carburetor Rebuild Kit — 350-500 CFM\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/350-500cfm-holley-pro-series-renew-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design 350-500 CFM Holley 2300 Pro Series Carburetor Renew Kit — Gas\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/390-950cfm-holley-renew-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design Holley 4150 Performance Renew Kit — 390-1000 CFM Carburetor Rebuild\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/390-950cfm-holley-pro-series-renew-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design Holley 4150 Pro Series Renew Kit — 390-1000 CFM Carburetor Rebuild\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/390-950cfm-holley-renew-kit-alcohol\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design Holley 4150 Alcohol Renew Kit — 390-950 CFM Carburetor Rebuild\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Advanced Engine Design Vacuum Secondary Tuning Kit \\u2014 Holley Carburetor Spring Set (7-Piece)\",\"description\":\"Optimize your Holley carburetor's secondary engagement with the Advanced Engine Design Vacuum Secondary Tuning Kit. Achieve peak power and efficiency.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Advanced Engine Design\"},\"mpn\":\"5580\",\"url\":\"https:\/\/ggcracing.com\/products\/vacuum-secondary-tuning-kit\",\"offers\":{\"@type\":\"Offer\",\"price\":\"15.75\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/vacuum-secondary-tuning-kit\",\"sku\":\"BJLH_5580\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ggcracing.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Suspension\",\"item\":\"https:\/\/ggcracing.com\/collections\/suspension\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Advanced Engine Design\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=Advanced+Engine+Design\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Advanced Engine Design Vacuum Secondary Tuning Kit \\u2014 Holley Carburetor Spring Set (7-Piece)\",\"item\":\"https:\/\/ggcracing.com\/products\/vacuum-secondary-tuning-kit\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Advanced Engine Design Vacuum Secondary Tuning Kit \\u2014 Holley Carburetor Spring Se fit my vehicle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Compatibility depends on your exact year, make, and model. Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Advanced Engine Design?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Advanced Engine Design Vacuum Secondary Tuning Kit \\u2014 Holley Carburetor Spring Se?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Suspension work requires proper spring compressors and torque specs. Plan 2-4 hours per corner for a DIY install.\"}}]}\u003c\/script\u003e","brand":"Advanced Engine Design","offers":[{"title":"Default Title","offer_id":40866605760596,"sku":"BJLH_5580","price":16.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/AED5580.jpg?v=1714265940"},{"product_id":"quick-change-vacuum-secondary-tuning-kit","title":"Advanced Engine Design Quick Change Vacuum Secondary Tuning Kit — Holley","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Advanced Engine Design\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eAdvanced Engine Design engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Advanced Engine Design lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/lgssCtLClFo\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eMaster Your Secondary Opening Rate with AED Tuning Kits\u003c\/h2\u003e\u003cp\u003eVacuum secondary carburetors rely on the delicate balance of air pressure to determine when the secondary throttle blades open. The Advanced Engine Design (AED) Quick Change Vacuum Secondary Tuning Kit allows you to adjust this opening rate without removing the carburetor from the engine. This is the ultimate convenience for track-side tuning, enabling you to find the perfect balance between fuel economy and wide-open throttle performance.\u003c\/p\u003e\u003ch3\u003ePrecision Tuning Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick Change Housing:\u003c\/strong\u003e Allows for rapid spring swaps in minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor-Coded Springs:\u003c\/strong\u003e Includes a variety of tensions to match your engine's vacuum signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel Construction:\u003c\/strong\u003e Built for durability and consistent spring rates under heat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Holley Fitment:\u003c\/strong\u003e Compatible with most Holley vacuum secondary carburetors.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eBy selecting the correct spring, you can delay or accelerate the secondary opening to match your vehicle's weight, gearing, and engine torque curve. A spring that is too light will cause the secondaries to open too early, resulting in a bog or hesitation; a spring that is too heavy will cause the engine to feel sluggish at the top end. This kit empowers you to fine-tune your carburetor for maximum power delivery, ensuring your engine performs at its peak in every gear. Enhance your tuning capabilities with this essential kit from GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Advanced Engine Design products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/350-500cfm-holley-renew-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design Holley 2300 Carburetor Rebuild Kit — 350-500 CFM\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/350-500cfm-holley-pro-series-renew-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design 350-500 CFM Holley 2300 Pro Series Carburetor Renew Kit — Gas\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/390-950cfm-holley-renew-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design Holley 4150 Performance Renew Kit — 390-1000 CFM Carburetor Rebuild\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/390-950cfm-holley-pro-series-renew-kit\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design Holley 4150 Pro Series Renew Kit — 390-1000 CFM Carburetor Rebuild\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/390-950cfm-holley-renew-kit-alcohol\" style=\"color:#0066cc;text-decoration:none;\"\u003eAdvanced Engine Design Holley 4150 Alcohol Renew Kit — 390-950 CFM Carburetor Rebuild\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Advanced Engine Design Quick Change Vacuum Secondary Tuning Kit \\u2014 Holley\",\"description\":\"Easily tune your Holley vacuum secondaries with the AED Quick Change Kit. Color-coded springs for precision performance. Order today at GGCRACING.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Advanced Engine Design\"},\"mpn\":\"5585\",\"url\":\"https:\/\/ggcracing.com\/products\/quick-change-vacuum-secondary-tuning-kit\",\"offers\":{\"@type\":\"Offer\",\"price\":\"32.90\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/quick-change-vacuum-secondary-tuning-kit\",\"sku\":\"BJLH_5585\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ggcracing.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Suspension\",\"item\":\"https:\/\/ggcracing.com\/collections\/suspension\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Advanced Engine Design\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=Advanced+Engine+Design\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Advanced Engine Design Quick Change Vacuum Secondary Tuning Kit \\u2014 Holley\",\"item\":\"https:\/\/ggcracing.com\/products\/quick-change-vacuum-secondary-tuning-kit\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Advanced Engine Design Quick Change Vacuum Secondary Tuning Kit \\u2014 Holley fit my vehicle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Compatibility depends on your exact year, make, and model. Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Advanced Engine Design?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Advanced Engine Design Quick Change Vacuum Secondary Tuning Kit \\u2014 Holley?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Suspension work requires proper spring compressors and torque specs. Plan 2-4 hours per corner for a DIY install.\"}}]}\u003c\/script\u003e","brand":"Advanced Engine Design","offers":[{"title":"Default Title","offer_id":40866605858900,"sku":"BJLH_5585","price":35.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/AED5585.jpg?v=1714265957"},{"product_id":"vacuum-spring-assortment","title":"Demon Fuel Systems Vacuum Spring Assortment 7-Piece Set — Fits Holley 4150\/4160 Carburetors","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Demon Fuel Systems\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eDemon Fuel Systems engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Demon Fuel Systems lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/xTzS9P24HlU\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eOptimize Carburetor Performance with Demon Vacuum Springs\u003c\/h2\u003e\u003cp\u003eAchieve the perfect secondary opening rate for your engine's specific vacuum profile with the Demon Fuel Systems Vacuum Spring Assortment. Designed for versatility and precision, this 7-piece kit allows tuners to dial in their carburetor's secondary response, ensuring smooth transitions and maximum power delivery under load. Whether you are running a street machine or a track-focused setup, these springs are essential for eliminating bogging and optimizing fuel efficiency.\u003c\/p\u003e\u003ch3\u003eKey Features and Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Tuning:\u003c\/strong\u003e Includes 7 distinct color-coded springs for a wide range of vacuum opening rates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Fitment:\u003c\/strong\u003e Engineered specifically for Demon carburetors and compatible with Holley 4150 and 4160 series models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e High-quality steel material ensures consistent spring tension and longevity under repeated heat cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Installation:\u003c\/strong\u003e Designed for quick swaps, making track-side tuning simple and efficient.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eProper secondary tuning is the difference between a sluggish throttle response and a crisp, high-performance feel. By selecting the correct spring tension, you can effectively manage the vacuum secondary opening point to match your vehicle's camshaft profile and intake manifold vacuum levels. Do not settle for factory settings when you can customize your fuel delivery to match your engine's unique needs. Upgrade your fuel system components today with premium parts from GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Demon Fuel Systems products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/hollow-squirter-screw\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Hollow Squirter Screw — Slot Head Steel Cadmium\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/needle-seat-hardware\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Needle and Seat Hardware Kit — Fits Demon \u0026amp; Holley Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/straight-discharge-nozzles-031-2pk\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Straight Discharge Nozzles .031 2pk — Fits Demon Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/mopar-throttle-cruise-stud-kit-street-demon\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Mopar Throttle \u0026amp; Cruise Stud Kit - Steel Zinc Oxide for Street Demon Ca\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/6-dual-feed-fuel-line\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems #6 Dual Feed Fuel Line - Braided Stainless Steel - Blue\/Red\/Silver - De\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Demon Fuel Systems Vacuum Spring Assortment 7-Piece Set \\u2014 Fits Holley 4150\/4160 Carburetors\",\"description\":\"Fine-tune your carburetor performance with the Demon Fuel Systems Vacuum Spring Assortment. Includes 7 color-coded springs for precise tuning. Shop now!\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Demon Fuel Systems\"},\"mpn\":\"120083\",\"url\":\"https:\/\/ggcracing.com\/products\/vacuum-spring-assortment\",\"offers\":{\"@type\":\"Offer\",\"price\":\"22.94\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/vacuum-spring-assortment\",\"sku\":\"BGWW_120083\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ggcracing.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Suspension\",\"item\":\"https:\/\/ggcracing.com\/collections\/suspension\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Demon Fuel Systems\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=Demon+Fuel+Systems\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Demon Fuel Systems Vacuum Spring Assortment 7-Piece Set \\u2014 Fits Holley 4150\/4160 Carburetors\",\"item\":\"https:\/\/ggcracing.com\/products\/vacuum-spring-assortment\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Demon Fuel Systems Vacuum Spring Assortment 7-Piece Set \\u2014 Fits Holley 4150\/4160  fit my vehicle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Compatibility depends on your exact year, make, and model. Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Demon Fuel Systems?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Demon Fuel Systems Vacuum Spring Assortment 7-Piece Set \\u2014 Fits Holley 4150\/4160 ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Suspension work requires proper spring compressors and torque specs. Plan 2-4 hours per corner for a DIY install.\"}}]}\u003c\/script\u003e","brand":"Demon Fuel Systems","offers":[{"title":"Default Title","offer_id":40869024464980,"sku":"BGWW_120083","price":22.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/DMN120083.jpg?v=1714317948"},{"product_id":"step-up-piston-spring-kit-street-demon","title":"Demon Fuel Systems Street Demon Step-Up Piston Spring Kit — Color-Coded Tuning","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Demon Fuel Systems\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eDemon Fuel Systems engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Demon Fuel Systems lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/meh4WPg7VuA\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eOptimize Your Fuel Curve with the Demon Street Demon Step-Up Piston Spring Kit\u003c\/h2\u003e\u003cp\u003eThe power valve system in your Street Demon carburetor plays a critical role in fuel delivery under varying load conditions. The Demon Fuel Systems Street Demon Step-Up Piston Spring Kit allows you to precisely tune this crucial component, ensuring optimal fuel enrichment and throttle response. This color-coded kit provides a range of spring tensions, enabling you to fine-tune when your power valve activates, perfectly matching your engine's vacuum characteristics and performance demands.\u003c\/p\u003e\u003ch3\u003ePrecision Tuning for Power Valve Activation\u003c\/h3\u003e\u003cp\u003eThis comprehensive kit includes multiple step-up piston springs, each with a distinct tension, easily identifiable by its color coding. By adjusting the spring tension, you control the vacuum level at which the power valve opens, enriching the fuel mixture for increased power during acceleration. This adjustability is vital for eliminating hesitation, preventing bogging, and ensuring a smooth, powerful transition from cruise to wide-open throttle.\u003c\/p\u003e\u003cul\u003e    \u003cli\u003e\n\u003cb\u003eColor-Coded Springs:\u003c\/b\u003e Easy identification for quick and accurate tuning adjustments.\u003c\/li\u003e    \u003cli\u003e\n\u003cb\u003eOptimizes Power Valve Activation:\u003c\/b\u003e Tailor fuel enrichment to your engine's specific needs.\u003c\/li\u003e    \u003cli\u003e\n\u003cb\u003eEnhances Throttle Response:\u003c\/b\u003e Eliminates flat spots and improves acceleration.\u003c\/li\u003e    \u003cli\u003e\n\u003cb\u003eImproves Fuel Curve:\u003c\/b\u003e Ensures proper air-fuel ratio under varying engine loads.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Impact of Correct Power Valve Tuning\u003c\/h3\u003e\u003cp\u003eAn incorrectly set power valve can lead to either a lean condition under acceleration (causing hesitation and potential damage) or an overly rich condition (wasting fuel and reducing power). With this step-up piston spring kit, you gain the control to achieve the ideal fuel curve, maximizing both performance and efficiency. It's an essential upgrade for anyone looking to extract the best possible drivability and power from their Street Demon carburetor.\u003c\/p\u003e\u003ch3\u003eGenuine Demon Quality for Uncompromised Performance\u003c\/h3\u003e\u003cp\u003eTrust Demon Fuel Systems for components that deliver measurable performance improvements. This step-up piston spring kit is engineered for durability and precision, ensuring your Street Demon carburetor performs exactly as you intend. Elevate your carburetor's responsiveness and fuel delivery with this expert tuning solution. Discover more performance parts at GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Demon Fuel Systems products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/hollow-squirter-screw\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Hollow Squirter Screw — Slot Head Steel Cadmium\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/vacuum-spring-assortment\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Vacuum Spring Assortment 7-Piece Set — Fits Holley 4150\/4160 Carburetor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/needle-seat-hardware\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Needle and Seat Hardware Kit — Fits Demon \u0026amp; Holley Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/straight-discharge-nozzles-031-2pk\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Straight Discharge Nozzles .031 2pk — Fits Demon Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/mopar-throttle-cruise-stud-kit-street-demon\" style=\"color:#0066cc;text-decoration:none;\"\u003eDemon Fuel Systems Mopar Throttle \u0026amp; Cruise Stud Kit - Steel Zinc Oxide for Street Demon Ca\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Demon Fuel Systems Street Demon Step-Up Piston Spring Kit \\u2014 Color-Coded Tuning\",\"description\":\"Fine-tune your Demon Street Demon carburetor's power valve with this color-coded step-up piston spring kit. Optimize fuel delivery and throttle response.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Demon Fuel Systems\"},\"mpn\":\"1937DEM\",\"url\":\"https:\/\/ggcracing.com\/products\/step-up-piston-spring-kit-street-demon\",\"offers\":{\"@type\":\"Offer\",\"price\":\"47.78\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/step-up-piston-spring-kit-street-demon\",\"sku\":\"BGWW_1937DEM\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ggcracing.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Suspension\",\"item\":\"https:\/\/ggcracing.com\/collections\/suspension\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Demon Fuel Systems\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=Demon+Fuel+Systems\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Demon Fuel Systems Street Demon Step-Up Piston Spring Kit \\u2014 Color-Coded Tuning\",\"item\":\"https:\/\/ggcracing.com\/products\/step-up-piston-spring-kit-street-demon\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Demon Fuel Systems Street Demon Step-Up Piston Spring Kit \\u2014 Color-Coded Tuning fit my vehicle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Compatibility depends on your exact year, make, and model. Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Demon Fuel Systems?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Demon Fuel Systems Street Demon Step-Up Piston Spring Kit \\u2014 Color-Coded Tuning?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Suspension work requires proper spring compressors and torque specs. Plan 2-4 hours per corner for a DIY install.\"}}]}\u003c\/script\u003e","brand":"Demon Fuel Systems","offers":[{"title":"Default Title","offer_id":40869031477332,"sku":"BGWW_1937DEM","price":44.96,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/DMN1937.jpg?v=1714318158"},{"product_id":"spring-kit","title":"Holley Vacuum Secondary Spring Kit — Fits 4150 \/ 4160 \/ 4500 Carburetors","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Holley\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eHolley is the legendary American carburetor and fuel-injection brand — over 100 years of induction history. From the iconic 4150 four-barrel to today's Sniper EFI conversions, Holley remains the choice for muscle car restorations, Pro Mod, and gasser builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/0FFfBZ3qgv0\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eFine-Tune Your Secondary Opening\u003c\/h2\u003e\u003cp\u003eThe Holley Vacuum Secondary Spring Kit is the ultimate tool for tuners looking to optimize the secondary opening rate of their Holley 4150, 4160, or 4500 series carburetors. By adjusting how quickly your secondary butterflies open, you can eliminate engine bog and maximize acceleration based on your specific engine build, camshaft profile, and vehicle weight.\u003c\/p\u003e\u003ch3\u003eKit Highlights\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSet of 7 color-coded springs for precise tuning adjustments.\u003c\/li\u003e\n\u003cli\u003eIncludes springs for various opening rates to suit any driving style.\u003c\/li\u003e\n\u003cli\u003eConstructed from high-quality steel for consistent tension and longevity.\u003c\/li\u003e\n\u003cli\u003eCompatible with a wide range of Holley performance carburetors.\u003c\/li\u003e\n\u003cli\u003eEssential for dialing in street or strip performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTuning vacuum secondaries is one of the most effective ways to improve throttle response and overall driveability. A lighter spring allows for earlier opening, while a stiffer spring delays it, helping to prevent hesitation on engines with lower vacuum signals. This kit provides you with the flexibility to test and find the exact spring that matches your vehicle's unique power curve. Don't settle for out-of-the-box performance when you can customize your carburetor to perfection. Elevate your engine's potential with quality components from GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Holley products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/performance-carburetor-500cfm-street-avenger\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley 500CFM Street Avenger 2-Barrel Carburetor — Aluminum Finish\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/performance-carburetor-750cfm-4160-series\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley 4160 Series Performance Carburetor 750CFM — Square Bore Aluminum\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/750-cfm-4150-hp-carb-double-pumper\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley 750 CFM 4150 HP Double Pumper Carburetor 4-Barrel — Mechanical Secondary\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/competition-carburetor-1250cfm-4500-series\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley 4500 Series Dominator 1250 CFM 4-Barrel Competition Carburetor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/650-cfm-classic-hp-carb-4150-double-pumper\" style=\"color:#0066cc;text-decoration:none;\"\u003eHolley Classic HP 4150 650 CFM 4-Barrel Carburetor — Mechanical Secondary Square Bore\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Holley Vacuum Secondary Spring Kit \\u2014 Fits 4150 \/ 4160 \/ 4500 Carburetors\",\"description\":\"Fine-tune your carburetor performance with the Holley Vacuum Secondary Spring Kit. Get the perfect throttle response today at GGCRACING.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Holley\"},\"mpn\":\"20-13\",\"url\":\"https:\/\/ggcracing.com\/products\/spring-kit\",\"offers\":{\"@type\":\"Offer\",\"price\":\"24.34\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/spring-kit\",\"sku\":\"BBVL_20-13\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ggcracing.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Suspension\",\"item\":\"https:\/\/ggcracing.com\/collections\/suspension\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Holley\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=Holley\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Holley Vacuum Secondary Spring Kit \\u2014 Fits 4150 \/ 4160 \/ 4500 Carburetors\",\"item\":\"https:\/\/ggcracing.com\/products\/spring-kit\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Holley Vacuum Secondary Spring Kit \\u2014 Fits 4150 \/ 4160 \/ 4500 Carburetors fit my vehicle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Compatibility depends on your exact year, make, and model. Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Holley?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Holley Vacuum Secondary Spring Kit \\u2014 Fits 4150 \/ 4160 \/ 4500 Carburetors?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Suspension work requires proper spring compressors and torque specs. Plan 2-4 hours per corner for a DIY install.\"}}]}\u003c\/script\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":40893293199444,"sku":"BBVL_20-13","price":25.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/HLY20-13.jpg?v=1714912858"},{"product_id":"carburetor-spring-assortment","title":"Edelbrock Carburetor Step-Up Spring Assortment — Performer \u0026 Thunder AVS","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Edelbrock\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eEdelbrock built its name on the Performer intake manifold in 1938 and has since become an American performance institution — intakes, cylinder heads, carburetors, and complete crate engines. The choice of street-strip, Pro-Touring, and Pro-Mod builders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/qdXcoRIix2c\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eMaster Your Fuel Curve with Edelbrock Step-Up Springs\u003c\/h2\u003e\u003cp\u003eAchieving the perfect fuel mixture is essential for engine longevity and performance. The Edelbrock Carburetor Step-Up Spring Assortment (1464) provides the necessary components to dial in your metering rods for optimal transition and power. Whether you are experiencing a lean stumble or rich running conditions, this kit allows you to customize the vacuum-operated step-up timing to match your engine's specific camshaft profile and vacuum characteristics.\u003c\/p\u003e\u003ch3\u003eWhat is included in the Kit?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Color Springs:\u003c\/strong\u003e Blue, Yellow, Orange, Pink, and Plain springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for Edelbrock Performer and Thunder AVS carburetors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Adjusts the vacuum point at which the metering rods transition to the power mode\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEase of Use:\u003c\/strong\u003e Simple installation for quick track-side tuning\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis assortment kit is a must-have for any serious tuner. By experimenting with different spring rates, you can effectively eliminate hesitation and ensure your engine performs at its peak under varying load conditions. Don't settle for a generic tune; take control of your fuel delivery system with this comprehensive spring kit. For premium tuning components and expert advice, look no further than GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Edelbrock products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/edelbrock-superchargers-2013\" style=\"color:#0066cc;text-decoration:none;\"\u003eEdelbrock Superchargers Catalog 2013 — Performance Parts Reference\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/edelbrock-sport-compact-2006-r0806\" style=\"color:#0066cc;text-decoration:none;\"\u003eEdelbrock Sport Compact Catalog 2006 — Performance Parts Reference\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/pro-flo-air-cleaner-element\" style=\"color:#0066cc;text-decoration:none;\"\u003eEdelbrock Pro-Flo 1000 Triangle Air Filter Element — Reusable 5.75x5.75x3.5 Black\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/10in-signature-series-a-c-black\" style=\"color:#0066cc;text-decoration:none;\"\u003eEdelbrock 10in Signature Series Pro-Flo Air Cleaner - Black Powder Coat\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/14in-pro-flo-air-cleaner\" style=\"color:#0066cc;text-decoration:none;\"\u003eEdelbrock Pro-Flo Air Cleaner 14in Round — Chrome Steel Raised Base\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Edelbrock Carburetor Step-Up Spring Assortment \\u2014 Performer \u0026 Thunder AVS\",\"description\":\"Fine-tune your Edelbrock Performer or Thunder AVS carburetor with this step-up spring assortment kit. Achieve optimal fuel metering. Buy at GGCRACING.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Edelbrock\"},\"mpn\":\"1464\",\"url\":\"https:\/\/ggcracing.com\/products\/carburetor-spring-assortment\",\"offers\":{\"@type\":\"Offer\",\"price\":\"16.95\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/carburetor-spring-assortment\",\"sku\":\"BDVJ_1464\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ggcracing.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Suspension\",\"item\":\"https:\/\/ggcracing.com\/collections\/suspension\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Edelbrock\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=Edelbrock\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Edelbrock Carburetor Step-Up Spring Assortment \\u2014 Performer \u0026 Thunder AVS\",\"item\":\"https:\/\/ggcracing.com\/products\/carburetor-spring-assortment\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Edelbrock Carburetor Step-Up Spring Assortment \\u2014 Performer \u0026 Thunder AVS fit my vehicle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Compatibility depends on your exact year, make, and model. Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Edelbrock?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Edelbrock Carburetor Step-Up Spring Assortment \\u2014 Performer \u0026 Thunder AVS?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Suspension work requires proper spring compressors and torque specs. Plan 2-4 hours per corner for a DIY install.\"}}]}\u003c\/script\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":41008841162836,"sku":"BDVJ_1464","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/EDE1464.jpg?v=1715793958"}],"url":"https:\/\/ggcracing.com\/collections\/carburetor-springs\/closeout.oembed","provider":"GGCRACING INC","version":"1.0","type":"link"}