The Bilstein B14 PSS Suspension allows you to adjust your vehicle's ride height without the expense of the fully adjustable damping system. This system features both coilover and standard monotube gas pressure shocks with performance level valving along with application specific, progressive rate coil springs. The PSS system lets you set your car low and tight for optimum performance or back to a more stock like ride height and handling characteristics. Ride height adjustments can be made on the vehicle without removing the suspension. The solid aluminum spring seat and lock nut allows a selective adjustment of the vehicle's ride height. Spring travel and vehicle body height change, but the spring seat remains pre-loaded throughout the allowable range of adjustment.