Convert your Corvettes 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. You can lower both base model cars (1" to 2" of drop) and Z06 models (.5" to 1.5" of drop). QA1?s coil-overs are easy to install with basic hand tools and use factory mounting locations. They do not require the use of a toe link relocation kit. , , They are available with multiple spring rate options to help you find the perfect option for your intended use. The medium springs are great for cars that will mostly be used on the road. The firm option is geared toward track-oriented cars, further reducing body roll under hard cornering and providing a more planted feel. , , These QA1 shocks are made in the USA, serialized, dyno tested and eligible for a limited lifetime warranty. Register your coil-overs before installation by visiting qa1.net/warranty to enter contact information and serial numbers. Installation Notes: , , Models with electronic ride control require Real Time Damping simulators. , , Does not require a toe link relocation kit.