Hypercoils 4" Coil-Over Spring - 2-1/2" I.D. - 600 lb. 30005P Has externally accessible pressure relief

Has externally accessible pressure relief valve (max 14 psi)

Straight-through design ensures unrestricted exhaust flow and reduces back pressure

1977-1990 Chevrolet G10

The pieces are finished with stylish

Hypercoils 4" Coil-Over Spring - 2-1/2" I.D. - 600 lb. 30005P Has externally accessible pressure reliefHypercoils 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