TKR5403 – Differential Ring Gear (straight cut, CNC, 40t, NT48 front, ET48 front/rear) Features: • True straight cut design for maximum efficiency • Smoother and quieter than Tekno standard gears • CNC hardened steel construction Vehicle Compatibility • TKR5403 - Differential Ring Gear (straight cut, CNC, 40t, NT48 front, ET48 front/rear) is included with the ET48, ET48.3, MT410, NT48 and NT48.3 kits and can be used as a replacement part for those vehicles. • This item is not directly compatible with other vehicles as it could have different geometry or require additional parts. Please use the instruction manual from the kit(s) listed above to verify can work with your vehicle before purchasing.Click the links above to view other parts.