Skunk2 Pro S Full Coilovers utilize advanced racing shock technology with track and street tested pre-determined precision valving. Skunk2 Pro Series Full Coilover suspension are dual-tube design for added reliability and durability. Includes Pro Series shocks, hard anodized CNC-machined aluminum spring perches, and CNC-wound SAE 9254 racing springs. Provides serious performance, exceptional build quality, and unsurpassed ride quality at an affordable price for the serious performance enthusiast.