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.