Our exclusive Detroit Speed Complete QUADRALink Rear Suspension Kits combine our individual products into a system designed for your vehicle. The Detroit Speed Kit 1 provides the ease of bolt-on components to improve your 1982-1992 Camaro/Firebird. The Speed Kit 2 takes performance to the next level while the Complete QUADRALink Rear Suspension Kit is the most advanced system you can purchase for your 1982-1992 Camaro/Firebird.The Detroit Speed Inc. QUADRAlink Kit, eliminates the factory torque arm configuration. It features no-compromise suspension geometry and all links are independently adjustable. The kit adds upper link mounts to stock unibody structure and lower links are re-located on the axle using adjustable adapter brackets. The new Detroit Speed adjustable track bar features cross-axis pivot bushings. Upper and lower links features our Swivel-Link™ technology. This kit is designed to work with 3" axle tubes.Double Adjustable Shock This is the most race winning shock JRi has in its stable. With its two independent adjustments and the enormous range of adjustment it can be set to the exacting demands of the driver and performance levels required while providing excellent ride quality on the street.Spring Rate: 275lbs/inSpring Free Length: 10in