Rubber front and OEM rear upper mounts.6061-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 bracketsSpring rate: 10kg front, 5kg rear. (Eye style rear). 10kg front, 6kg rear ( Fork style rear).