80401002 High Flow Air Filter Fits 2-3-4 Barrel Carburetors with 5-1/8 Inch Diameter Neck.

80401003 High Flow Air Filter Fits 2-3-4 Barrel Carburetors with 5-1/8 Inch Diameter Neck.

80401005 High Flow Air Filter Fits 1 and 2-Barrel Carburetors with 2-5/16 Inch or 2-5/8 Inch Neck

80401001 High Flow Air Filter Fits Most Carburetors and Throttle Bodies with a 5-1/8 Inch Neck.

80401004 High Flow Air Filter Fits Most 2,3 and 4-Barrel Carburetors with 5-1/8 Inch Neck.