Hypercoils 13" Rear Coil Spring - 5" O.D. - 250 lb. Analog Tach 6' bed trucks with 143

6' bed trucks with 143

Features aluminum weld bung

By capturing both parts of the bushings

1969-1977 Pontiac Firebird

Hypercoils 13" Rear Coil Spring - 5" O.D. - 250 lb. Analog Tach 6' bed trucks with 143Hypercoils 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