Rotating Assemblies

Aluminum vs. cast iron heads—what’s better for your build? We break down power, weight, heat, and cost to help you choose the right cylinder heads.

Lifter tick vs rod knock—what's the difference? Learn how to identify these engine noises, their causes, potential damage, and how to fix them.

Comparing GM’s LS V8 engine to the high-tech LT V8 engine. Which is better for your performance needs and budget?

Learn how to choose the right valve springs for your camshaft, the differences between single and dual valve springs and when to replace them.

Are you considering a Toyota 2JZ swap? Learn all about the famed inline-six and what cars came with the 2JZ engine from the factory.

Learn how to properly mockup a 2JZ swap with Toyota's legendary engine using our guide to mounts, turbos, and essential components

While everyone is looking for a 6.0 LS, don’t count out the original 5.7 LS1 engine for your next LS swap performance build

Learn what are the best stock LS heads that will interchange to use on your budget 4.8, 5.3, 6.0, or 6.2 LS engine build

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

The camshaft is the heart of your engine, choose the wrong one and you’re leaving power on the table