Hypercoils 4" Coil-Over Spring - 2-1/2" I.D. - 600 lb. 30005P while including the maximum linear

while including the maximum linear travel required by dirt racers

and add strength to your 3rd and 4th-Gen GM F-body with a non-adjustable Torque Arm from BMR Suspension

1960-1966 GMC 3000

The pieces are finished with stylish

Has externally accessible pressure relief valve (max 14 psi)

Hypercoils 4" Coil-Over Spring - 2-1/2" I.D. - 600 lb. 30005P while including the maximum linearHypercoils 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