UMI Performance Lowering Spring Kits are designed in conjunction with a leading Sprint Cup chassis engineer. The front springs are wound from 5160 CrSi premium wire and the rear springs are wound from 9254 CrSi premium wire, all with an application specific linear rate. The linear rate provides consistent handling characteristics which are important for auto cross and pro touring applications while the increase in stiffness reduces body roll and prevents the characteristic A-Bogy floating feeling. These springs are perfectly suitable for auto cross, pro touring and corner carving/cruising applications. The ride height is engineered for a 1" lowering with standard Small Block Chevy, Pontiac 400, aluminum head/intake Big Block Chevy and LS power. The front springs are suitable for full weight Big Block applications when nose down rake is desired. Durable black powder-coat finish. Made in USA.
Granatelli's Lowering Spring Kits is designed to give your GM car a more aggressive stance and firmer performance feel. These spring kits lowers the center of gravity just enough to improve handling without undermining ride quality. Simply swap the stock springs for Granatelli Springs, and no other modifications are required. Installation takes 1 to 2 hours using basic hand tools and a coil spring compressor.