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.

There are plenty of high-powered, performance-oriented LS engines out there. But what about the LS4? How powerful is that particular iteration?

Custom V-8 LS-Swapped Scion FR-S Pair Built for Sideways Shenanigans Much more than just a trend, GM’s LS V-8 takes this FR-S drift duo to a whole new level.