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 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.Single Adjustable Shock:Includes all features of base shock with 'Detroit Tuned' valving plus installed rebound adjustment with the simple turn of a knob while providing excellent ride quality on the street.Spring Rate: 275lbs/inSpring Free Length: 10in