USA Standard Ring & Pinion Gear Set For GM 12 Bolt Car in a 3.90 Ratio

Yukon Gear & Axle is well-known for making solid drivetrain components, and this USA Standard ring and pinion gear set is no exception. If you're looking to change the gear ratio in your GM 12 Bolt rear end, this set offers a 3.90 ratio that can help improve acceleration. This is a popular choice for vehicles like the Chevrolet Chevelle, Pontiac GTO, and Chevrolet Camaro from the 1960s and early 1970s.

These USA Standard gear sets are built to go beyond what the factory specified. Each set undergoes strict in-house checks to make sure the dimensions, materials, and fitment all meet their standards. A 3.90 ratio means the engine will spin a bit faster at highway speeds compared to a stock gear, but you'll feel a noticeable difference when you get on the gas.