Bilstein B8 5100 (Ride Height Adjustable)for the Nissan D40 OE coilover style suspension. Multiple snap-ring grooves in the body allow for different spring seat positions, providing 0-2.75 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.