GMC K25 AMC 232 Engine Parts

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

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

To celebrate the upcoming 106th running of the Indianaplis 500, here's a look back at a few of the engines that have competed at the Brickyard over the years.

Engine Cylinder Numbers

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

Speedway Motors announced today the introduction of a new IMCA Modified Spec Racing Engine as they kick off the 2025 race season along with discounts Jan. 27-Feb. 2 to help their customers get ready for race season.

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.