The Detroit Speed G-Body Coilover Conversion Kit allows the latest in coilover spring/shock technology to be bolted on to any G-Body, bringing your classic's handling and ride into the 21st century with our 'Detroit Tuned' valving. The base coilover package offers extensive ride height adjustability and Detroit Speed valving. This kit is designed for a factory GM axle with 2-3/4" axle tubes.Spring Rate: 175lbs/inSpring Free Length: 11in