LS and LT Engine Reference Guide for the Gen. 3, Gen. 4 & Gen. 5 LS/LT, Vortec/EcoTec3 Engines

Though the dozens of engines in the GM LS and LT families have many similarities, there are significant differences as well—and it’s important to know exactly what those are if you’re upgrading your LS or LT engine for more performance, or planning an LS or LT engine swap.

We’re trying to clear up some confusion between the dozens of engines that fall into the LS/LT engine families with Spec Guides, Spotter’s Guides, and Upgrade Guides on the LS and LT motors.

To make it easier to quickly distinguish key differences/similarities between each LT and LS engine, Summit Racing created a handy .PDF that you can use as a quick reference guide. You can download it in the link below, or keep scrolling down to the tables at the bottom of this story.

Click Here to View/Print/Download the Summit Racing LS & LT Engine Reference Guide,

Want more LS/LT information? Click here for LS Engine Content and here for LT Engine Content.

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

Gen. 3/4/5 LS/LT and Vortec/EcoTec3 Guides

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