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Cummins 4BT / 3.9L Engines & Parts

Capital Reman Exchange – Nationally Recognized Remanufacturer of Cummins 4BT / 3.9L Engines & Parts

WHY YOU should purchase through capital reman exchange:

  • Get Back Quickly – no time wasting
  • Save 47% on Average Over Dealers
  • Same OEM and Aftermarket Parts as Dealers
  • 1 Year Warranty on Par with OEM
  • Fair Core Acceptance
  • Same Day Shipping on Parts
  • International Shipping Available
  • 80+ Years of Remanufacturing Experience
  • AERA Certified Machine Shop

We are your One Stop Shop for parts and service for Cummins© 4BT engines swaps. We offer remanufactured parts for the widest range of Cummins© 4BT engine models and horsepower ratings. Our sister company, Big Bear Engine Company sells new surplus Cummins 4BT engines. They also have an assortment of used 4BT engines as well. In addtition to 4BTs, we regularly deliver parts for the following Cummins© engines: VT1710, QSK60, QSK78, 855, N14, L10, M11, KTA19, KT38, KT50, 3.9, 4BT, 6BT, ISX-15, ISB, ISC and many more. We have everything you need to service and overhaul the Cummins© engine on your machine.

  • Cummins© 4BT Camshafts
  • Cummins© 4BT Lifters / Followers
  • Cummins© 4BT Connecting Rods
  • Cummins© 4BT Cylinder / Piston Packs
  • Cummins© 4BT Crankshafts
  • Cummins© 4BT Cylinder HeadsAERA
  • Cummins© 4BT Cylinder Blocks
  • Cummins© 4BT Accessories

Read Our FAQ Page to Learn More.

Cummins 4BT / 3.9L Engines & Parts


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Capital Reman Exchange did an outstanding job completely rebuilding out old Cummins 855 engine. The office staff was professional, very responsive to our needs and the outcome was fantastic. I recommend them to everyone.
Rick U., Phoenix, AZ
Excellent service! Working Saturday to accommodate me while coming down from Canada. I couldn't have asked for any better. Thank you!!
Barry De Pape, Winnipeg Manitoba
I am very pleased with your help and product and look forward to working with you in the future. Thanks.
Mike H., Minnesota


Parts & Labor

We offer an unlimited miles 1 year warranty on our diesel engines.

The first 6 months covers parts and labor and the second 6 months covers parts replacement.

Contact us for more information on our warranty program.

Our Warranty

Modern Facilities &

Our modern facilities and equipment include our full machine shop and separate engine building departments.

These facilities help keep Capital Reman Exchange a cut above the competition.

Remanufactured Engines

Engine Builders

We believe our consultative approach to solving diesel engine problems helps to craft the perfect solution to fit your specific application.

Call us today, we would love to help you with all of your heavy duty engine needs!