Buick 4.1 Engine

Learn correct spark plug firing orders for SBC, LS, Mopar, AMC, and Ford V8s, and learn what the correct firing order means for performance.

The GM LS engine is the hot powerplant these days. But is there too much of a good thing?

Looking to swap the venerable LS engine into your hot rod, muscle car, or classic truck? Take a look at our detailed identification guide for Gen III/IV LS engines before you hit the salvage yard or swap meet!

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.

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

Inside GM’s Gen V LT engine family: history, tech, and performance of each LT engine option available.

Follow this restoration guide as Josh breathes new life back into his Pontiac engine.

Jeff tackles the task of installing a Big Block Engine into his 1967 Chevelle. Read about the hardships he faced and some of the tricks he learned to make this installation run smoothly.

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

Overheating is a major cause of DNFs and damaged engines. We'll go beyond the cooling system for solutions to your overheating issues.