SNS2 Series - Suspension Shock Absorber Bilstein SNS2 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 feature a steel body cap and a Schrader valve or fill plug. They are upgradeable to adjustable shafts and can be converted to a coilover (kit sold separately). SNS2 Series shock absorbers are ideal for racers whose sanctioning rules require an all steel construction with rebuild capability. Plated steel body for durability and superior heat dissipation 46mm piston design for maximum damping control Standard 1/2” graphite heims .