LC Engineering manufactures this adapter from billet 6061-T6 aluminum. This will allow you to use a aftermarket air cleaner on your Weber 32/36 or 38 carburetor. The adapter will go from the Weber top flange to the industry standard 5 1/8 inch filter opening. You can use the K&N 11 x 2 or similar flanged 5 1/8" air filter. See part number 1033031 for the kit with air filter included. NOTE: This adapter may not work on pre 1985 trucks. There are hood clearance issues, unless it has a body lift. To view this part and any other part numbers in this listing visit our website. Check out www.LCEngineering.com for New Products, Tech Articles, Specials & Monthly Newsletters! Contact our Tech Support Line for further information at 928-855-6341.