We build a 427-inch LSX engine with an iron block and Chevrolet Racing high-compression COPO pistons to make 661 hp on Westech Performance’s Superflow dyno.

General Motors' LS series engines have been around since 1997, and have one key design feature that enables upgrades that significantly boost horsepower.

We show you how to do an LS Engine Swap on a budget using this 1966 Chevy Chevelle and parts from Summit Racing, Rock Auto, Comp Cams and more!

Project Groundhog, Part 1: Cleaning up and machining rusty parts from a 2005-era Chevy truck engine that was literally pulled out of a dirt floor.