G-Body Grand National Parts

Learn about the power behind the G-body platform and the steps to upgrade a 7.5" bolt rear end to a 8.5" to withstand high horsepower. See how to change the differential fluid and install new gaskets.

This Cobra features a G-Comp suspension and an unlikely engine choice, but its mission is the same as those storied Cobras of old. It was built to win races.

This little Nova is loaded with G-Comp suspension, big tires, and a nasty LS engine. It's a mean autocross machine, even if it seems like an unlikely candidate.

Need a little help Identifying GM Body Styles 1964-1972? Click Here!

GM’s 10-bolt rear axle has been around since the 1960s, here’s how to determine if your junkyard find is worth taking home

Here's a handy guide to familiarize you with our G-Comp line of performance suspension systems.

In this budget build, a GM rear end is upgraded in order to hold 400+ HP. See how spherical bushings are replaced in a used 8.5” GM 10 bolt rear end.