This is a harden steel #45 rear differential ring gear and pinion gear by GPM Racing.
- The material is upgraded to harden steel #45 to make it more durable and sturdy to use.
- Reduce the gap in between gears, in order for the gears to run smoother and more powerful.
- Improve the transmission of power in the differential case.
- Ring Gear
- Pinion Gear
- Stainless Steel Pin 2.5x13