Hypercoils 12" Front Coil Spring - 5-1/2" O.D. - 1100 lb. 10206S 600'' exhaust valves this head

600'' exhaust valves this head moves tremendous volumes of air through conservative runner volumes

1999-2005 Ford F-350 Super Duty 96

Heavy Duty Steel

1975-1990 Cadillac DeVille

Pro Street 3000 Stall Series

Hypercoils 12" Front Coil Spring - 5-1/2" O.D. - 1100 lb. 10206S 600'' exhaust valves this headHypercoils are manufactured from the highest quality chrome silicone steel and high tensile chrome silicone steel available in the world. The material used in producing Hypercoils undergoes two separate magnaflux inspections. Once before manufacture and again after coiling. These inspections insure the wire is free from surface imperfections which, if gone undetected could lead to spring failure. The life of a suspension coil is directly related to