aFe Power Magnum FLOW Pro 5R Air Filter Element - Conical - 8-1/2" Base Diameter - 7" Top Diameter - 8" Tall - 4-1/2" Flange - Reusable Cotton - Blue HYPLXSM11M61 1-1/16 in Cap

1-1/16 in Cap

000 in Offset

200 lb/in Spring Rate

1977-1986 Pontiac Firebird

aFe Power Magnum FLOW Pro 5R Air Filter Element - Conical - 8-1/2" Base Diameter - 7" Top Diameter - 8" Tall - 4-1/2" Flange - Reusable Cotton - Blue HYPLXSM11M61 1-1/16 in CapThe 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