4BT 3.9L

Cummins 4BT 3.9L Heavy Duty Engines

3.9L 4BT Cummins Injection Pumps, Injectors, Turbo & Fuel System Parts



Compact, dependable, and built to perform, the Cummins 4BT 3.9L diesel engine has become a favorite for off-road enthusiasts, commercial equipment operators, industrial machinery, and custom diesel conversion projects. Renowned for its legendary durability, outstanding fuel economy, and impressive low-end torque, the 4BT delivers reliable performance in even the toughest environments. Our extensive inventory includes Cummins 4BT turbochargers, fuel injectors, injection pumps, cylinder heads, camshafts, pistons and liners, bearings, oil pumps, water pumps, exhaust manifolds, head gasket kits, fuel system components, turbo parts, sensors, and engine accessories—all conveniently available in one place.  Call our experienced diesel specialists at 859-737-4966 for free advice, or if you don't see your part listed below, we'll get it for you!