Hypercoils 12" Front Coil Spring - 5-1/2" O.D. - 800 lb. Air & Fuel Delivery Deals 1975-1980 GMC Jimmy

1975-1980 GMC Jimmy

4150 and 4160 Instantaneous response

Every Dougs header comes with all the necessary mounting hardware

200" range beehive spring mic

Plastic shock protectors slide over aluminum threaded body shock to protect against wear from spring

Hypercoils 12" Front Coil Spring - 5-1/2" O.D. - 800 lb. Air & Fuel Delivery Deals 1975-1980 GMC JimmyHypercoils 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