LS Rotating Assemblies for LS1, LS2, LS3, and more

We can customize any of our rotating assemblies or engine kits to meet your performance needs. Be assured that every kit we sell is put through the same meticulous "Butler Process" as the engines we build here in-house. Plus we will provide all the needed specs and technical help to you and/or the engine builder of your choice. We work with many top quality engine and machine shops across the country and will be glad to work with yours. Here at Butler our main concern is that you end up with the engine you desire.