Hypercoils 12" Coil-Over Spring - 2-1/2" I.D. - 600 lb. Classic Instruments Our engineering staff at Ferrea

Our engineering staff at Ferrea spends countless hours conducting flow bench tests to achieve an optimum balance of flow

1962-1972 Plymouth Valiant

For vehicles with electronic control (ETC) systems

7/8 in Spline

Hypercoils 12" Coil-Over Spring - 2-1/2" I.D. - 600 lb. Classic Instruments Our engineering staff at FerreaHypercoils 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