GM 8.875 Inch 12-Bolt Car, Engine Parts

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

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

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

Why was the Pontiac 350 phased out for the Chevy 350? Discover the key differences, performance, and advantages between these iconic GM small-block V8 engines.

Read up on GM 10 bolt ring and pinion installation instructions. Follow along as our employee Zach installs a GM 10 bolt rebuild kit from Motive Gear.

Steve provides a step-by-step guide to install the Speedway Motors GM 10-Bolt Polished Finned Aluminum Rear End Cover.

Learn how to ID a Ford 8.8 rear end by tag, width, and code. Compare 8.8 vs 9-inch axles, decode gear ratios, and find which Ford models used them.

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.

Learn how to assemble one of our bolt on nine-inch Ford disc brake kits in this step-by-step guide.