Holley Vintage Series 14" Finned Air Cleaner Assembly Finish:Cast The narrowed shock crossmember is

The narrowed shock crossmember is used when running this leaf spring relocation kit

Fits: 1964 1965 1966 1967 1968 1969 1970 1971 1972 Pontiac GTO

They are the Tall design with breather holes

Hydroboost Mounting Plate is designed to prevent your hydroboost from spinning or rotating under hard

Holley Vintage Series 14" Finned Air Cleaner Assembly Finish:Cast The narrowed shock crossmember isThese 14" round air cleaners are manufactured from die cast aluminum with a stamped 1" drop base and include a 3" premium cotton gauze (pre oiled, red, washable and reusable) filter element. All necessary hardware is included for installation on Holley 4150 and 4160 carburetors with a 5. 125" diameter neck.