Air Cleaner Assembly. Easy-Flow Air Cleaner. Easy-Flow Air Cleaner; For Use w/2 3 And 4 Barrel Carburetors; 6.5 in. Dia.; High Riser; H-3 in.; 5 1/8 in. Carburetor Neck;. Now an important part of Holley Performance, Mr. Gasket continues to expand application coverage with more and more new products for race cars and muscle cars alike.