aFe Power Magnum FLOW Pro 5R Conical Air Filter Element - 7-1/2 in Base - 5-1/2 in Top - 5 in Flange - 12 in Tall - Blue Quarter-Turn Mounting Bracket With special compartments for storing

With special compartments for storing racing helmets and shoes

1977-1978 GMC P35

1-1/8-12 Fine Thread

Exhaust port and bolt pattern are raised

aFe Power Magnum FLOW Pro 5R Conical Air Filter Element - 7-1/2 in Base - 5-1/2 in Top - 5 in Flange - 12 in Tall - Blue Quarter-Turn Mounting Bracket With special compartments for storingThe Pro 5R is our most performance oriented media available, outperforming virtually all other cotton gauze media on the market today. It provides your engine with the largest amount of high flowing air, usually resulting in the highest horsepower and torque gains out of all aFes filter media options. 98. 6% Filtration Efficiency Advanced FLOW engineering (aFe Power) is a premier designer and manufacturer of automotive performance upgrade systems and