The Bilstein B16 (PSS10) Performance Suspension System is a race-inspired, bolt-on coilover kit designed for the BMW M3 (F80) and M4 (F82/F83). This system offers 10-stage precise compression and rebound damping adjustment via a simple manual knob, allowing for a perfect balance between comfort and performance. Features threaded body height adjustment for a customized lowered stance and improved aerodynamics. All components are finished in Bilstein's Triple-C-Technology for long-lasting corrosion resistance. Kit Components: - Front Left Coilover Damper (48-244091-FL) - Front Right Coilover Damper (48-244091-FR) - Rear Shock Absorbers (x2) (48-244091-R) - Progressive Rate Performance Springs (Front & Rear) - Adjustable Spring Seats/Perches - Spanner Wrenches for Height Adjustment