{"product_id":"kleinn-ultra-hk9-730-horns-blastmaster-valve-upgrade-kit","title":"Kleinn Ultra HK9 730 Horns BlastMaster Valve Upgrade Kit — Demon Train Horn","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 Kleinn Air Horns\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eKleinn Air Horns engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kleinn Air Horns 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\/0THwOXBp6Dg\" 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\u003eKleinn Ultra HK9 730 Horns BlastMaster Valve Upgrade Kit: Unleash the Demon\u003c\/h2\u003e\u003cp\u003eTake your Kleinn Model 730 Demon train horn to an unprecedented level of sound with the Ultra HK9 BlastMaster Valve Upgrade Kit. This kit is specifically designed for the Model 730, transforming its already powerful blast into an earth-shattering roar by dramatically increasing air flow to each trumpet.\u003c\/p\u003e\u003ch3\u003eMaximize Your Train Horn's Potential:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated Air Source:\u003c\/strong\u003e The kit provides everything needed to add two additional VX6003 solenoid valves to your Model 730 Demon.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncreased Airflow:\u003c\/strong\u003e By dedicating a solenoid valve to each trumpet, the kit ensures a massive increase in air flow, pushing the Model 730 to unheard-of decibel levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtreme Volume:\u003c\/strong\u003e Prepare for a train horn sound that will truly crush eardrums and command attention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Engineering:\u003c\/strong\u003e Designed by Kleinn to perfectly integrate with your Model 730, ensuring optimal performance and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Kit:\u003c\/strong\u003e Includes all necessary components for the upgrade, making installation straightforward for enhanced sound.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf you own a Model 730 Demon and crave the loudest, most commanding train horn sound possible, the Ultra HK9 BlastMaster Valve Upgrade Kit is an absolute must-have. Elevate your horn's performance with 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 Kleinn Air Horns 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\/kleinn-black-dual-horn-10in-7-5in-xcr2-0-coated-zinc-alloy\" style=\"color:#0066cc;text-decoration:none;\"\u003eKleinn Black Dual Air Horn — 10\"\/7.5\" XCR2.0 Coated Zinc Alloy\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/kleinn-chrome-dual-horn-15in-12-25in-chrome-plated-zinc-alloy\" style=\"color:#0066cc;text-decoration:none;\"\u003eKleinn 102 Chrome Dual Air Horn Kit — 15in\/12.25in Trumpets, Loud Train Sound\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/kleinn-black-dual-horn-15in-12-25in-xcr2-0-coated-zinc-alloy\" style=\"color:#0066cc;text-decoration:none;\"\u003eKleinn 102-1 Black Dual Air Horn Kit — 15in\/12.25in Trumpets, XCR2.0 Coated\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/kleinn-dash-mount-analog-air-pressure-gauge-0-250-psi-1-4in-m-npt-inlet\" style=\"color:#0066cc;text-decoration:none;\"\u003eKleinn 1021 Dash Mount Analog Air Pressure Gauge — 0-250 PSI, 1\/4in M NPT\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/kleinn-sealed-tank-mount-pressure-switch-1-4in-m-npt-90-psi-on-120-psi-off\" style=\"color:#0066cc;text-decoration:none;\"\u003eKleinn 2121 Sealed Tank Mount Pressure Switch — 90 PSI On \/ 120 PSI Off, 1\/4in M NPT\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\":\"Kleinn Ultra HK9 730 Horns BlastMaster Valve Upgrade Kit \\u2014 Demon Train Horn\",\"description\":\"Unleash extreme decibels from your Kleinn Model 730 Demon train horn with the Ultra HK9 BlastMaster Valve Upgrade Kit. Dramatically increase airflow! Shop now!\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Kleinn Air Horns\"},\"mpn\":\"6890\",\"url\":\"https:\/\/ggcracing.com\/products\/kleinn-ultra-hk9-730-horns-blastmaster-valve-upgrade-kit\",\"offers\":{\"@type\":\"Offer\",\"price\":\"199.99\",\"priceCurrency\":\"USD\",\"availability\":\"https:\/\/schema.org\/InStock\",\"url\":\"https:\/\/ggcracing.com\/products\/kleinn-ultra-hk9-730-horns-blastmaster-valve-upgrade-kit\",\"sku\":\"KLE6890\"}}\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\":\"Parts \u0026 Accessories\",\"item\":\"https:\/\/ggcracing.com\/collections\/parts-\u0026-accessories\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kleinn Air Horns\",\"item\":\"https:\/\/ggcracing.com\/collections\/vendors?q=Kleinn+Air+Horns\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Kleinn Ultra HK9 730 Horns BlastMaster Valve Upgrade Kit \\u2014 Demon Train Horn\",\"item\":\"https:\/\/ggcracing.com\/products\/kleinn-ultra-hk9-730-horns-blastmaster-valve-upgrade-kit\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does the Kleinn Ultra HK9 730 Horns BlastMaster Valve Upgrade Kit \\u2014 Demon Train Horn 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 Kleinn Air Horns?\",\"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 Kleinn Ultra HK9 730 Horns BlastMaster Valve Upgrade Kit \\u2014 Demon Train Horn?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most installs are bolt-on with basic hand tools. See manufacturer documentation for torque specs and procedures.\"}}]}\u003c\/script\u003e","brand":"Kleinn Air Horns","offers":[{"title":"Default Title","offer_id":41456743809108,"sku":"KLE6890","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/352a2747fb188b96e947189440266d67.jpg?v=1721695246","url":"https:\/\/ggcracing.com\/en-co\/products\/kleinn-ultra-hk9-730-horns-blastmaster-valve-upgrade-kit","provider":"GGCRACING INC","version":"1.0","type":"link"}