This is where “Air Ride Technology” begins and is still a valuable solution for many applications. The CoolRide® system replaces the traditional coil-spring and shock with an air spring and shock as separate units. CoolRide systems are engineered to perform and come with all hardware and brackets. The CoolRide® system will raise and lower the vehicle, improving the handling and offering a terrific ride.HQ Series Shocks provide rebound adjustment to the driver and the ability to tune ride quality and handling to your specific taste. A wide range of rebound adjustment allows you to cruise down the road in plush comfort or firm up your suspension for those Saturday morning canyon roads.