The GKTECH diff bushing removal/installation tool set has been designed to reduce the amount of tears, blood and sweat generally required when removing a diff bushing from a 370z (or G37). The OEM diff uses a single stud and as a result the OEM bushing is prone to premature wear. Unfortunately, the OEM bushes are quite difficult to remove. As a result of our own frustration, this kit was designed. This kit has been designed specifically for the 370z/G37 steel subframe. - 13 piece kit - Includes heavy duty grade 12.9 M20x2.5 rod and M12x1.75 rod - Spare rods available for purchase separately for those using frequently (sold separately) as seen here: Vehicle Compatibility: - Nissan Z34 370z - Infiniti G37