LS3 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More

Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family tree: Chevy, Pontiac, GMC, Cadillac, Buick—heck, even Saab, Hummer, and Isuzu got some LS love.

Since LS and Vortec engines are so common, they’ve become the go-to performance and swap engines of the modern era.

These motors are capable of making a lot of horsepower, and respond well to upgrades like turbos, superchargers, high-flow cylinder heads, intake systems, cams, and nitrous oxide.

The aftermarket is strong, crate engines are available, and used motors are often cheaply sourced through junkyards.

Summit Racing has created a series of comprehensive guides for each engine in the LS family, so engine builders and tuners can have a handy reference for their projects.

This specific guide is for the GM LS3, you can find more LS engine spec guides and LS-related information here.

[Do you have an LS3 engine you want to upgrade? Read: LS3 Car Engine Upgrade Guide: Expert Advice for LS3 Engine Mods to Maximize Performance.]

 

(Summit Racing’s Paul Spurlock and Brian Nutter contributed to this article.)

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Chevy LS3 Engine Specs

The LS3 is a Gen. 4, 6.2L small block engine used in GM performance cars between 2009 and 2017. The information listed here is for a stock engine.

 

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