International L121 Engine Parts

Build a high-performance Gen V LT engine with proven power combos and learn about LT upgrades and tuning tips for maximum power

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!

To celebrate the upcoming 106th running of the Indianaplis 500, here's a look back at a few of the engines that have competed at the Brickyard over the years.

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

Engine Cylinder Numbers

The 1964 Corvette L79 327 is legendary, learn more about this storied engine and what you need to build a clone.

The 1964 Corvette L76 327 is legendary, learn more about this storied engine and what you need to build a clone.

In this Tech Tip, John discusses LT1 rotating assembly options for a customer looking to build a solid autoX, drag, and occasional strip powerplant for his Firebird.

Pat talks about one of our LS1 fuel delivery kits.