Mr. Gasket 6411G Air Cleaner Adapter Ring and Riser Kit Adapts 5-1/8" neck (4 or 2 bbl carb) air cleaners to 3" and 2- 5/8" 2 barrel carbuertor necks Two air cleaner risers offer three height adjustments Helps clear throttle or transmission linkage Eliminates air cleaner fit problems High-impact, heat resistant material for durability