BRAND: IMPCO APPLICATION: AIR HORN MOUNTS DIRECTLY ON TOP OF 425 TO ACCEPT A 4" FILTER. GREAT FOR CUSTOM FILTERS OR SNORKEL KITSMOST ORDERS SHIP IN 2-10 BUSINESS DAYS, FREE SHIPPING TO THE 48 STATESSHIPS SAME DAY AS ORDERED (IN MOST CASES)Be 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. Powered by eCRATER . List your items fast and easy and manage your active items. On Jan-23-09 at 13:28:44 PST, seller added the following information:Your browser does not support JavaScript.To view this page, enable JavaScript if it is disabled or upgrade your browser. Click Here. Double your traffic. Get Vendio Gallery - Now FREE!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!