This is a replacement Mugen 46 Tooth Spur Gear for use with the optional HTD (High Traction Diff) Center Differential (MUGE2245).
The HTD Center Diff (MUGE2245) comes standard with this 46 tooth spur gear, but other optional spur gears are available:
- MUGE2234: HTD Spur Gear (44T)
- MUGE2235: HTD Spur Gear (46T)
- MUGE2236: HTD Spur Gear (48T)