5.57 12 Bolt GM Pass

The Richmond 5.57 12 Bolt GM Pass ring and pinion gear set is a performance drivetrain upgrade designed specifically for GM 12-bolt differentials requiring a 5.57 gear ratio. This component kit is ideal for off-road recovery operations, towing scenarios, and high-load vehicle platforms where factory gearing may not suffice.

Featuring a 30-spline pinion and a ring gear size of 8.875 inches, the 5.57 ratio strikes a balance between acceleration and top-end capability. The Pro Gear construction indicates high-quality materials and tolerances engineered for sustained performance under load, making it suitable for serious enthusiasts and professionals alike.

This upgrade is particularly beneficial for operators managing custom 4x4 builds and vehicle recovery specialists. It provides the necessary mechanical advantage for low-speed, high-torque environments, ensuring optimal performance in the GM 12-bolt differential ecosystem.