


⚙️ Upgrade Your Ride with Precision Power!
The USA Standard Gear ZG GM8.5-390 Ring and Pinion Gear Set is a precision-machined, heavy-duty drivetrain upgrade crafted from durable 8620 steel. Designed specifically for GM 8.5" differentials, it features a robust 30 spline configuration and 12 ring gear bolts for enhanced torque handling and reliability. Backed by a 1-year warranty and ready to install, this gear set ensures a seamless, high-performance upgrade for serious automotive enthusiasts.
| Manufacturer | USA Standard Gear |
| Brand | USA Standard Gear |
| Product Dimensions | 40.64 x 30.48 x 15.24 cm; 8.24 kg |
| Item model number | ZG GM8.5-390 |
| Manufacturer Part Number | ZG GM8.5-390 |
| OEM Part Number | ZG GM8.5-390 |
| Volume | 1152 Cubic Inches |
| Assembly Required | No |
| Manufacturer | USA Standard Gear |
| Item Weight | 8 kg 240 g |
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