Hypercoils 20" Rear Coil Spring - 5" O.D. - 125 lb. H77803FXXL 1992-1997 Pontiac Firebird

1992-1997 Pontiac Firebird

The internal substrate material and precious metal loading have been carefully engineered for maximum efficiency and to avoid MIL (Malfunction Indicator Lamp) code issues that are common with lower quality converters

transmission cooler lines

Moving headrest allows for universal use in all seating positions

Hypercoils 20" Rear Coil Spring - 5" O.D. - 125 lb. H77803FXXL 1992-1997 Pontiac FirebirdHypercoils 20" Rear Springs allow the spring to stay in contact with the perch at all times for a wider range of pre loading. Hypercoils 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