By combining the ST Speed-tech Springs and ST Sport Shocks you get the best and take the guess work out of suspension tuning, getting it done right the first time. ST Speed-tech Springs are specifically engineered for optimal performance and comfort and offer a more aggressive lowered look than the ST Sport Spring. Improve your ride with ST Suspension Speed-tech Springs to lower the center of gravity, reduce body roll in corners, and limit weight transfer under acceleration. ST Sport Shocks are designed exclusively for lowered vehicles featuring the advanced valve tuning targeted at controlling the higher spring rates associated with performance lowering spring. The shortened or reduced rebound travel optimizes the piston stroke of the shock absorber guaranteeing a balanced chassis under any circumstances. ST Speed-tech Suspension kits are professionally designed and matched to meet the demands of the enthusiast and offer significant improvements in handling and grip.