Holley Vintage Series Air Cleaners & Valve Covers. We take a look at their latest air cleaners and valve covers that fit your small-block Chevy and LS. MotorTrend Staff Writer Nov 09, 2016.

Test 1 Baseline with no air cleaner, 0-4779 750-cfm Holley w/choke. Test 4 Flat base, 14x4-inch filter, Stub Stack, and Flow Top. Test 5 9-inch-diameter, 2-inch-tall air cleaner w/paper filter.