Bilstein SN2 Series shock absorbers feature a steel smooth body design utilizing the 46mm monotube technology (piston and piston band sold separately) designed for motorsports applications. These shock absorbers are available in non- single and double adjustable configurations in optimized lengths and can also be converted to a coilover design (kit sold separately). SN2 Series shock absorbers are ideal for racers whose sanctioning rules require steel body shock absorbers but allow for a user rebuildable design and aluminum end caps.