You are watching: What is the cubic inch of a 5.3 liter engine

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See all 3 photosWith simply a gentle cam and valvespring swap, a diminutive Gen III 5.3L LS can make north of 400 hp. Include pocket-ported LS heads and GM"s superior TrailBlazer SS entry manifold, and you can be looking at 450 hp on a 5.3, and also knocking on the door of 500 hp with the 5.3"s 6.0L large brother—as proven repeatedly in test by Richard Holdener and (shown here) Jeff blacksmith at Westech Performance.


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See all 3 photosEdelbrock"s new Pro-Flo 4 LS ECU and Harness Kit (PN 35711) is designed specifically for junkyard Gen III LS engine swaps, complete seamlessly with the OE GM LS injectors, coils, crank sensors, and other factory intake manifold relations to substantially simplify the installation, start-up, and also performance tuning processes. As of august 1, 2019, it"s on sale at Summit Racing for $810.95. At that price, you"d be tough put to uncover a better system. Finish kits including intake manifolds are likewise available.