Hypercoils 13" Rear Coil Spring - 5" O.D. - 200 lb. 37017K 105" wall chromemoly steel then

105" wall chromemoly steel then black oxide coated and heat-treated

making it ideal for wrapping starter motor or other components that are close to high heat areas

increased strength and improved heat dissipating characteristics

Proven to handle 500 miles of competition at over 9500 RPM

Hypercoils 13" Rear Coil Spring - 5" O.D. - 200 lb. 37017K 105" wall chromemoly steel thenHypercoils 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