This kit is designed for the high performance C4 Driver. This suspension system was tested and perfected with the help of multi-time National Champions Danny Popp and Guy Ankey. The kit includes a special front spring that is ride height and corner weight adjustable. Off set lower control arm bushings are designed to increase camber adjustment. Xtreme Bilstein gas shocks increase handling capabilities, which reduce off-throttle, oversteer. This complete kit will give you the same components that have been bringing the checkered flag home for the pro's. This kit includes: Xtreme Front Spring, Xtreme Rear Spring, Xtreme Front Sway Bar, Xtreme Rear Sway Bar, Set Front Off-set Lower Control Arm Bushing Kit, Set of Polyurethane Bushing Kit and Four Bilstein Xtreme Gas Shocks.