APPLICATION: THIS IS A V8 PROPANE CONVERSION KIT GOOD FOR 300HP (HIGH HP KITS AVAILABLE)THIS KIT WILL WORK WITH VEHICLES WITH OR WITH-OUT A HEATERTHE KIT IS DESIGNED TO USE YOUR EXISTING THROTTLE PLATETHE 425 IS A DIRECT BOLT ON FOR THE HOLLEY 4 BARREL 600CFM(OTHER THROTTLE PLATES REQUIRE ADAPTER)INCLUDES:IMPCO ORIGINAL MODEL E REGULATOR &425 MIXER, HOLLEY AIR CLEANER ALONG WITH ALL HOSING, FITTINGS ETC. FOR A COMPLETE INSTALLATION KITNOTE:GENERAL INSTRUCTIONS INCLUDEDWE ALSO SUPPLY ADAPTERS AND THROTTLE PLATESFEEL FREE TO EMAIL US WITH QUESTIONS!SHIPS IN 1 OR 2 DAYS FROM ORDER(in most cases)MOST ORDERS SHIP IN 2-10 BUSINESS DAYS, FREE SHIPPING IN THE 48 STATESBe sure to add me to your favorites list!Check out my other items!Sign up for PayPal; the fast, easy, and secure way to pay online.We have thousands of parts in stock, send us a message if you do notseethe part you need!Feel free to ask us about conversion kits for almost anything including trucks, cars, generators, tractors, boats, motorcycles, RVs etc. We can build a kit to convert almost any engine!