Rubber Front and Rubber Rear Upper MountsSpring rate: Front 10kg, Rear 10kg6061-T6 Aluminum Top PlatesSAE9254 Powder Coated Springs6061-T6 Aluminum Lock Rings53mm Aluminum Threaded Shock BodiesPrecision machine welded STKM13C Steel Lower Mounts or 6061-T6 milled Aluminum Lower Mounts where applicable100% bolt on in place of OEM brackets**Swift spring upgrade available.