LY5

Intro to the LY5 Engines The LY5 came in GM trucks and SUVs in 2007-‘09 and made 320 horsepower right out of the box. It’s a Gen. 4 5.3L iron-block engine, so you’re getting the better intake manifold, connecting rods, and ECM. The engine also had 799/243 casting heads and 9.9:1 flat tops. 5.3’s don’t get

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