Bilstein B8 5100 (Ride Height Adjustable) shock absorbers are designed for trucks and SUVs with a front OE coilover style suspension. Multiple snap-ring grooves in the body allow for different spring seat positions, providing 0-3 inches of front lift with OE springs (depending on application). The monotube shock absorbers feature a 46mm digressive piston a with self-adjusting deflective disc valve setting. Bilstein B8 5100 (Ride Height Adjustable) shock absorbers provide increased wheel travel and improved handling. Utilizing a B8 5100 (Ride Height Adjustable) shock absorber is the easiest way to level out your vehicle. Product Specifications: Collapsed Length (in) :13.23 Extended Length (in) :18.35 Collapsed Length (mm) :336.0 Extended Length (mm) :466.0 Finish :Zinc Plated Reservoir :No Body Design :Snap Ring Grooved Body (Coilover) Body Diameter (id) :46mm Replacement Mounting Kit :B4-KT1-Z219A03 Spring Seat Included :Yes Adjustable Damping :Non-Adjustable