The Bilstein PSS9 kit includes front struts with adjustable spring perches, rear shocks, rear springs, and rear spring height adjusters. Utilizing Bilstein’s monotube shock absorber design for heat dissipation and ride control, the PSS9 Coil-Over System adds a matched performance spring and threaded ride height adjuster to provide a complete suspension system for a vehicle. The fully adjustable monotube gas shock absorbers offer nine precise compression and rebound settings, from comfort to competition. The front and rear progressive rate springs allow for the accurate adjustment of a vehicle's ride height, stance, cornering balance and ride quality to maximize performance. All Bilstein gas pressure struts/inserts and gas pressure shock absorbers operate on the same principle. They are manufactured with the rod pointing down into the strut tube, thereby utilizing the thicker, stouter body portion of the shock absorber to dissipate side loads. Consequently, due to the increased diameter and surface of the pressure tube, the Bilstein gas pressure strut/insert or shock is better suited to take increased side loads when compared with the conventional version.
Additional advantages, based on development strongly influenced by the motorsport industry, include greater stability, better road handling, and accurate steering. This combined with extremely high quality manufacturing and materials, means Bilsteins will last approximately four times as long as Original Equipment. Bilstein's shock bodies are precision formed through a unique seamless extrusion process. This provides superior strength along with high finish tolerances. The shock body is then treated with a special paint finish durable enough to withstand grueling 240-hour salt spray tests. The finished body is mated with a solid, induction-hardened steel chrome plated and polished shaft, machined valving components and highest quality seals.
Bilstein products are backed by an aftermarket lifetime warranty.