Welcome to Synergy Engines!  We are a Crate Engine Rebuilding Company who specializes in popular Japanese Engines.  We are located in Plainwell Michigan, and service Subaru, Mitsubishi, Honda, Mazda, Nissan, and Toyota.   We specialize in mail order engines for those who do not have a specialist nearby.  All of our builds are completely machined; including Line Honing, Torque Plate Honing, and are Squared Up on the Crankshaft and Camshaft Centerlines.  We also offer Sleeving, Porting, and some CNC Services.  All of our engines are tested on our SimTest, Running Stand, or Engine Dyno before they are shipped.  We are here to help with engine core pickup, design services, parts selection, machine work, assembly, and testing for your dream project.  We can even handle some tuning with the dyno services!  Contact Us Today!