Cummins Diesel Engines — Used, Rebuilt & Remanufactured

Cummins builds a broad lineup spanning light-, medium- and heavy-duty diesel. Knowing your series helps us source the right unit quickly.

Cummins diesels turn up across the widest range of commercial work of any brand. The 6.7L ISB dominates the heavy-duty pickup and medium-duty box truck market, while the C and L series are favorites in school buses, delivery trucks and RVs. The 15-liter ISX and X15 are mainstays of long-haul Class 8 sleeper and day-cab tractors hauling regional and over-the-road freight.

Because Cummins parts and service support are everywhere, a Cummins-powered truck is easy to keep running for high mileage. That ubiquity also means strong availability of used and remanufactured cores, which keeps replacement pricing competitive compared with proprietary OEM engines.

A low-mileage used Cummins is the fastest and most affordable route back to service, and we dyno-test or verify compression where possible. A remanufactured Cummins is rebuilt to specification with new bearings, seals, gaskets and reconditioned internals, carrying the longest warranty and service life. For a truck you plan to keep working hard, remanufactured is often the better long-term value; for an older unit, a quality used engine makes sense.

We sell both long blocks and complete drop-in engines. A long block lets you transfer your existing turbo, fuel system and accessories, while a complete engine reduces shop labor. We confirm exactly what is included and the core requirements before you buy.