Hypercoils 12" Coil-Over Spring - 2-1/2" I.D. - 750 lb. SPBM3 Holley 4150 / 4500 Carburetors

Holley 4150 / 4500 Carburetors

2 x 3 in Primary Tubes

1967-1980 Ford Thunderbird

Universal adjustable fit from 26 to 49 in

40mm o-ring to o-ring length

Hypercoils 12" Coil-Over Spring - 2-1/2" I.D. - 750 lb. SPBM3 Holley 4150 / 4500 CarburetorsHypercoils 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