Hypercoils 11" Rear Coil Spring - 5" O.D. - 275 lb. 12199901 Gauge measures from 65" to

Gauge measures from 65" to 115" in 1/4" increments

75 in the front

Control Arm Bracket Tower

The 3-angle adaptor is used to speed up the airflow after the air filter for improved performance and throttle response

Cold formed solid steelVehicle Applications: 2001-2010 Chevrolet Silverado/Sierra 2500/3500HD (All Cabs) 1 1/8" Rear SwaybarVehicle Applications: 2001-2010 Chevrolet Silverado/Sierra 2500/3500HD (All Cabs) 1 1/8" Rear Swaybar

Hypercoils 11" Rear Coil Spring - 5" O.D. - 275 lb. 12199901 Gauge measures from 65" toHypercoils 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