DSC - slow and fast compression regulator The 3” diameter body is made of anodized 6061-T6 aluminum IPF piston in the reservoir separates oil from gas under high pressure Components made of anodized 6061-T6 machined aluminum Chrome-plated 7/8” piston rod in heat-treated steel Engineered for motorsports high flow piston Triple sealing system Advanced JM92 oil for superior performance regardless of temperature Internal Bypass technology offering optimal damping force at all times