Check the listing for details. QA1 GD455-08550 Kit Pro Coil Front Aluminum Double Adjustable. Condition: New. Listed at 1240.54 USD. Kit, Pro Coil, Front, Aluminum Double Adjustable Convert your Corvette?s leaf spring suspension to QA1?s Proma Star coil-over shocks to improve handling, suspension tunability and ride quality while gaining the ability to quickly and easily adjust ride height for a perfect stance. These Corvette coil-overs offer the perfect balance of street-ability and performance if you plan to use your car on the road and occasionally take it to the track. Dial in your car?s ride quality and handling characteristics with adjustable valving, offering the ability to independently tune compression and rebound valving. Adjust your car?s ride height to improve its handling by lowering the center of gravity and gaining a greater ability to corner balance your car, maximizing performance.