Proform GM A-Body Parts

Speedway Motors employee Steve upgraded the trailing arms on his 1976 Chevrolet Laguna with some spherical bushings.

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

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.

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

All you need to know about racing a 602 GM crate engine and the necessary parts to make a race ready engine.

It's time to see if all our hard work to upgrade Project Chevelle will pay off in faster lap times. We set up a little autocross course to find out.

Decode, ID, and upgrade your GM 12-bolt rear end. Learn axle specs, gear ratios, and best performance parts upgrades.

Watch as we repeat our parking lot autocross to see how much our upgraded Project Chevelle has improved!

Learn about GM alternator identification in our guide. We cover GM 3 wire alternators, 1 wire alternators, and externally regulated so you know what to choose.

Understand GM’s AFM system—how it operates, it’s pros and cons, common lifter failures, and your options for tuning, disabling, or full AFM delete.