Remanufactured Engines

At Kustom Truck Parts, we specialize in factory remanufactured engines built for demanding semi-truck conversions, glider kit installs, engine repowers, and heavy-duty upgrades. Our lineup features proven Caterpillar (3406E, C7-C15 ACERT), Cummins (ISM CM570, ISX CM870/CM871/CM2250/CM2350), and Detroit Diesel (Series 60 DDEC4/DDEC5) reman engines—engineered to OEM standards for long-term durability, consistent performance, and reliable operation in custom chassis setups.

Choosing the right reman engine is key, but success also depends on seamless integration: compatible wiring harnesses, mounting brackets, cooling systems, transmission adapters, and upfit components. We provide the engines—and the supporting conversion solutions—to make your build straightforward and dependable.

Ideal for owner-operators, diesel shops, fleets, and builders seeking outright-purchase reman options (no core return required), these engines deliver factory-fresh reliability without the downtime of field rebuilds. Browse our selection for direct-fit reman powerplants ready to power your next heavy-duty project.