GM Ring and Pinion Gear Set GM 12 Bolt Car in a 3.90 Ratio USA Standard Gear
ZG GM12P-390
USA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring and pinion sets for a variety of common and hard to find applications.
- Fits GM 12 bolt passenger car
- 8.875 Inch Ring Gear Diameter
- 30 Spline Pinion
- 12 ring gear bolts
- 3.90 ratio
1 year warranty against Manufacturer defects