Bilstein XVA Series shock absorbers feature a 46mm piston, aluminum construction, and a threaded body designed for motorsports applications. 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. XVA Series shock absorbers are ideal for racers looking for an aluminum, rebuildable design with multiple upgrade options and superior performance.