Our Speed kits are designed to make your G-Body maintain optimum geometry and tire contact through the full range of rear suspension travel. Detroit Speed's unique G-Body rear links incorporate our patented Swivel-Link™ system. These Swivel-Links™ eliminate bind and allows the suspension to fully articulate without the use of noisy spherical rod ends. Swivel-Link™ Rear Links allow for easy pinion angle adjustment for improved traction, lower driveline vibrations and comes with all new hardware. With the Swivel-Links™ pinion angle and/or wheelbase can be adjusted without unbolting the link from the car. This kit is designed for a Factory GM 12-Bolt with 3" Axle Tubes.Spring Rate: 175lbs/inSpring Free Length: 11in