{"product_id":"moly-piston-ring-set-58","title":"Sealed Power Moly Piston Ring Set 4.030 Bore — Performance 8-Cylinder","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 Sealed Power\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eSealed Power engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Sealed Power 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\/ZfFZz1uYIrs\" 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\u003ePrecision Performance for 4.030 Bore Engines\u003c\/h2\u003e\u003cp\u003eFor engines that have been bored .030 over, the Sealed Power Moly Piston Ring Set (E921K30) provides the exact fitment and performance characteristics required for a successful build. These rings are designed for 8-cylinder engines with a 4.030-inch bore, utilizing high-quality steel and moly-facing technology. This combination is essential for modern performance applications where heat management and friction reduction are critical for success.\u003c\/p\u003e\u003ch3\u003eTechnical Highlights\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e Precision-sized for 4.030-inch overbore applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Steel construction with moly-filled top rings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Dimensions:\u003c\/strong\u003e 1.5 x 1.5 x 3.0 mm for precise sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Ideal for performance-oriented 8-cylinder rebuilds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Drop-in design for efficient engine assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe moly-filled top ring is the hallmark of this set, offering excellent resistance to scuffing and wear. This is particularly important for engines that have undergone machine work, as the ring-to-cylinder wall interface must be perfect to ensure long-term compression. By choosing this set, you are ensuring that your engine maintains consistent power output and minimal oil consumption. These rings are engineered to handle the increased pressures of performance engines while remaining durable enough for street use. Don't compromise on your engine's heart; choose the quality and precision of Sealed Power for your next project. Find everything you need for your engine build 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 Sealed Power 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\/speed-pro-performance-2015-x3009-r1006\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power Speed Pro Performance Street Catalog – 2015 Edition\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/cam-bearing-set-36\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power Cam Bearing Set Standard Journal — Fits Small Block Chevy V8\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/main-bearing-spacer-set\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power Main Bearing Spacer Set Standard — Fits 351C Crank in SBF\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/rod-bearing-171\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power 1555CPA10 Connecting Rod Bearing - 0.010 in Undersize - Pontiac V8\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/rod-bearing-172\" style=\"color:#0066cc;text-decoration:none;\"\u003eSealed Power Rod Bearing 0.020 Undersize — Fits Pontiac V8 Engines\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\":\"Sealed Power Moly Piston Ring Set 4.030 Bore \\u2014 Performance 8-Cylinder\",\"description\":\"Get precision performance with Sealed Power Moly Piston Rings for 4.030 inch bores. 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Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Sealed Power?\",\"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 Sealed Power Moly Piston Ring Set 4.030 Bore \\u2014 Performance 8-Cylinder?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most plug-and-play LED upgrades take 15-30 minutes per side. Full retrofits or harness installs may require additional wiring.\"}}]}\u003c\/script\u003e","brand":"Sealed Power","offers":[{"title":"Default Title","offer_id":41013740666964,"sku":"BDBR_E921K30","price":98.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/SEAE921K30.jpg?v=1715890262","url":"https:\/\/ggcracing.com\/products\/moly-piston-ring-set-58","provider":"GGCRACING INC","version":"1.0","type":"link"}