Engine Guides

The LM4 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2003 and 2005. It’s is very similar to the LM7, except that it’s built on an […]

[Editor’s Note: This L76 truck engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing […]

The L76 is a 6.0L, Gen. 4, aluminum small block engine used in both GM cars and trucks from 2007 to 2009. This article is dedicated specifically to the truck and […]

[Editor’s Note: This L33 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing at SpeedArticle. […]

The L33 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2005 and 2007. Although it is a truck engine, it used cylinder heads closely related to the […]

[Editor’s Note: This LY6 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing at […]

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 […]

The LY6 engine is a 6.0L Gen. 4 small block engine used in GM trucks and SUVs between 2007 and 2010. For marketing purposes, it was also known as the […]

[Editor’s Note: No offense to the LS4 intended, but the most notable thing about it is that it’s usually the worst-possible choice for an LS engine swap project because it’s designed […]

The LS4 engine is a Gen. 4, 5.3L, aluminum small block engine used in GM cars between 2005 and 2009. It is unique because it was the only LS engine used in FWD […]