For less than you would spend on a set of stock coils, you can upgrade your Corvette Performance Coil Springs. Made from high-grade steel, then powder coated for great looks and to resist corrosion. These springs will provide years of quality service. 1968-78 460 lb. Coil Springs are the best all-around coil spring available - and the ideal compromise between stock and performance springs. 1963-82 Performance Coil Springs give you even greater handling capacity, and lower your Corvette approximately 1" while upgrading to F-41 specifications. 13- TALL AND .660- THICK