5.3 LS Engine

Concerned about a transmission swap? Our engine transmission compatibility checker will help confirm what you need to make it happen.

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!

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

Both 5.3 and 5.7 LS engines are commonly sourced for LS swaps. Here's a look at some differences and similarities as well as a discussion of what might be the best choice for your project.

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

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

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

Small block Chevy V8 or the modern LS V8? Which one comes out on top as the best engine to swap into your ride?

Making great horsepower on a budget is the LS engine family’s claim to fame, but just like any other engine, the more power you ask of it the more you’ll need to spend

An LS cam swap can yield big power gains. And, you can do it at home. Here's how...