From 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.
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
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
CNC Fabrication, LLCBorn 17 years ago as a one-person garage venture, CNC Fabrication, LLC now develops and makes Ford Powerstroke diesel performance parts while providing engine and machining services from its 75,000-square-foot Bryan, Ohio, factory. The company is especially associated with its Powerstroke-specific upgrades, including its original 4-line fuel-feed kits, and offers customers the practical support and advice to match. Its founder, a former journeyman millwright with 22 years in the steel industry, continues to lead the growing operation.DEFIANCE, OH
Diesel ProFrom a farmhouse basement in Glen Rock, Pennsylvania, Diesel Pro has grown into a family-owned diesel parts remanufacturer, distributor, and repair operation serving customers across the United States and Canada. Founded by Lance Donaldson in 1985 and now managed by his son Scott, the company remanufactures fuel-system components and turbochargers while running a full-service truck repair facility with 11 bays. Its 30,000-square-foot warehouse holds more than 100,000 parts, giving the long-standing local business an unusually broad reach.GLEN ROCK, PA