GM LS3 Muscle & Classic Car Valve Covers

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

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!

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

The 4.8 LS engine is a salvage yard bargain vs the typical 5.3 or 6.0 LS and can still make great power for your LS swap needs.

The 454 big block Chevy is still a popular build option for when there is no replacement for displacement!

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

Who gets your pick as the best manufacturer from the golden age of the muscle car wars?

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

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

LS swaps are nothing new, but they're still a little mysterious to some of us. Here is an overview of what you will need and what you need to know to swap some modern performance into your muscle car, truck, or hot rod!