The C5 Xtreme Touring System was designed and built for the top Corvette competitor in Speedvision World Challenge and Motorola Cup showroom stock racing series. The targeted spring rates have been tested on the track and manufactured for the advanced street or racing customer. This kit uses industry standard polyurethane on the C5 conversion kit. The race designed toe and tie rods that are included, eliminate alignment change during hard cornering even when the brakes are hot. Koni single adjustable shocks allow you to tune your car to current tack or road conditions. Sway bars are sold separately to match individual driving style. Kit includes: Xtreme Front Spring, Xtreme Rear Spring, Four Koni Adjustable Shocks, Two Front Heavy-duty Tie Rod Ends, Two Rear Heavy-duty Tie Rod Ends, Two Sets of Adjustable Sway-bar End Links and a Polyurethane Control Arm Bushing Kit.