Bilstein XVS-S Series shock absorbers feature a 46mm piston steel construction and a threaded body designed for motorsports applications. These shock absorbers are rebuildable via an integrated Schrader valve. The large volume dual zone nitrogen bulb with optional base valve allows for lower gas pressure for increased grip. These shock absorbers are available in non- single and double adjustable configurations for precise on-vehicle tuning options. XVS-S Series shock absorbers are ideal for racers looking for a steel rebuildable design with multiple upgrade options and superior performance.