Hypercoils 8" Coil-Over Spring - 2-1/4" I.D. - 600 lb. 600090146 4150 and 4160 Instantaneous response

4150 and 4160 Instantaneous response

The GT dramatically improves the utility of your vehicle by increasing horsepower

by 7-3/8" total height

but is not recommended for street driven vehicles where the ambient temperature is regularly above 90 degrees

Hypercoils 8" Coil-Over Spring - 2-1/4" I.D. - 600 lb. 600090146 4150 and 4160 Instantaneous responseHypercoils 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