The Air Lift Performance Rear Kit - 78603 is a high-performance suspension upgrade for vehicles. This kit includes rear air springs, shock absorbers, and all necessary hardware for installation. The air springs are designed to provide adjustable ride height and improved handling, while the shock absorbers are specifically tuned for a sportier driving experience. The kit also includes a 3-position adjustable damping system for further customization of the suspension. This product is ideal for those looking to improve the overall performance and appearance of their vehicle.