Springs features a chrome vanadium steel construction Engineered to guarantee consistent rates for all springs They can be used with shims or weight jacks Has a 9-1/2"" free height and a 5" dimeter Has a purple powder coated finish for added corrosion resistance and enhanced looks Tru-Coil Racing Springs front coil springs are simply the finest on the market. These front coil springs are designed exclusively for oval track racing, and are guaranteed to withstand the rigorous conditions of the track. What makes these springs so durable is that they're constructed from chrome vanadium steel. Chrome vanadium steel is a premium material that has unbeatable strength and toughness, plus is fatigue resistant to scorching hot temperatures. Tru-Coil Racing Springs front coil springs are guaranteed to stay "Tru" to their rate and shape. Along with a chrome vanadium steel construction, these front coil springs have a powder coated finish. Powder coating is tougher than paint, resulting in a more durable product with superior corrosion protection. With their highly visible, remarkable purple color, these coil springs are easy to spot in victory lane. They can be used with shims or weight jacks and come in various rates ranging from 450 to 1450. Varying rates allows a racer a greater range in their chassis setup. Spring rates are marked on the coil spring for easy identification. Tru-Coil Racing Springs front coil springs are ground flat on one end. These amazing front coil springs will fit 1964-72 Chevelles and Monte Carlos, 1967-69 Camaros and Firebirds, and 1968-74 Novas. Front coil springs. Chrome Vanadium Steel construction. Guarantees consistent rates for all springs. Can be used with shims or weight jacks. Purple color. Powder coated finish. Ground flat on one end. 9-1/2" free height. 5" O.D. Varying rates from 450-1450. 5" front springs fit: 1964-72 Chevelle, Monte Carlo 1967-69 Camaro, Firebird 1968-74 Nova. For more information check out suggested spring setup chart forand Kits Available! Value added Tru-Coil Racing Springs 6 spring kit # 916-02021. Value added Eibach 6 spring kit # 916-02022. Value added Tru-Coil Racing Springs Sport Mod 4 kit # 9108653