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GM LS Series 5.3 High Output Engines


Engine Size







GM LS Series 5.3 High Output Engines

323 cu in







A souped up 5.3 that is ready and willing to deliver

Continuing the tradition of great small-block V-8 engines, the 5.3L LS engine has been one of the most popular we’ve ever built. It’s been installed in millions of GM-built pickups, work trucks, vans, and SUVs. But, leave it to the GM Performance Parts engineers to go one step further and upgrade the 5.3L LS. The result is a High Output 5.3 that is just as capable serving as a workhorse—it’s just a little bit more fun. We started with the base engine—the tough, proven, and dependable 5.3L engine. It’s the same long-lived production engine that you’ll find in our award winning full-sized truck and SUV line. The stock 5.3 offers a dependable 295 horsepower and 325 lb.-ft. of torque from the 96mm bore by 92mm stroke engine design. What makes our 5.3 High Output crate engine so special is that our engineers added a GM Performance Parts custom cam and Grafal-coated pistons. With these simple upgrades, the 5.3 HO kicks out 332 horsepower and 352 lb.-ft. of torque. And, just like the stock 5.3, the 5.3 HO is capable of thousands of miles of dependable service while returning outstanding fuel mileage, thanks to the superior design of the LS Family of engines. Try the 5.3 HO crate engine by GM Performance Parts. Your truck will thank you!




Give your work truck a workout

Get your late model SUV back up and running

Install a juiced-up 5.3 into something special

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine.Some applications may affect engine warranty. See page 384 for specific warranty information. Some applications may not be emission legal; check state and local ordinances.


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