The Belltech Street Performance PLUS lift shock lineup has been engineered to provide a premium adjustable ride quality for today's trucks, Jeep's and SUV's. With its independent compression and rebound adjustability our engineers focused their attention on the range of low speed compression force characteristics of this shock absorber, which is responsible for controlling your Sport Truck or SUV's pitch and roll, dive and squat to help keep you confident and in control. The adjustable "Progressive" rebound tuning will complement oversize wheels and tires, keeping the ride smooth but firm and in control.