DMAX Ltd. manufactures Duramax V-8 turbo-diesel engines for GMC Sierra and Chevrolet Silverado HD pickup trucks at its Moraine, Ohio facility. Production began in 2000, and the company reports that more than two million Duramax diesel engines have been put into operation since launch. DMAX is a subsidiary of General Motors, LLC.
ISO 14001
TS 16949
IATF16949
Quality certification
D&J Precision MachineFrom its Ohio shop, D&J Precision Machine builds and remanufactures Cummins diesel engines and precision performance components for trucks, racers, and professional installers. Founded by Drew Pumphrey from a passion for diesel performance, the company manufactures selected parts in-house—including its X-BEAM billet rods and tool-steel wrist pins—and develops engine builds that balance high horsepower with everyday reliability. D&J is headquartered in Cambridge and is part of the Burnout Brands group alongside BD Diesel and Monster Transmission.CAMBRIDGE, OH
Enterprise Engine PerformanceSince 1987, family-owned Enterprise Engine Performance has repaired and rebuilt diesel pickup engines at its Thornville, Ohio shop, pairing a service department with an in-house machine shop. Its mechanics and machinists handle everything from minor repairs to complete overhauls, including custom engine and driveline setups for pulling and drag trucks. The company also supplies rebuild kits and diesel parts for Cummins, Duramax, and PowerStroke applications.THORNVILLE, OH
Daimler Truck North America LLCDaimler Truck North America LLC designs, engineers, manufactures, and markets commercial vehicles and related technologies, and is a subsidiary of Daimler Truck Holding AG. Its North American operations include truck and bus manufacturing plants as well as its Portland corporate headquarters and design and test centers. The company’s stated history includes its establishment in 1942, and it serves the commercial transportation industry through brands including Freightliner, Western Star, Thomas Built Buses, and Detroit.BYESVILLE, OH
JEB Modern Machines, LTDFamily-owned and operated since opening in 2000, JEB Modern Machines fabricates custom performance parts and builds high-performance engines from its 20,000-square-foot facility. The Republic, Ohio, shop grew from a farming operation’s hands-on equipment experience into a CNC machining and engineering business known for diesel truck and tractor-pulling components, including turbo parts and billet accessories. Its research and development lab uses GibbsCam and CAD/CAM software, while a full-time quality control specialist inspects production.REPUBLIC, OH