GM L9H Valve Lifters

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!

Learn how to identfy motors for your LS Swap. In this guide we cover generation 4 small block engines and some of the cheaper options for more power.

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

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

To get the longest life and most performance out of your engine, it's important to have the valve lash set correctly. Here we show you how to set valve lash on a Small Block Chevy using a hydraulic lift camshaft in just eight steps.

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

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

Understand GM’s AFM system—how it operates, it’s pros and cons, common lifter failures, and your options for tuning, disabling, or full AFM delete.

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