Front and rear come standard without top mounts for this chassis. The OEM Top Configuration assembly is reused.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: 5kg front, 6kg rear.