Cummins 3.9 Liter Engines were used in many different applications from automotive step vans to various off road equipment. These engines are completely Remanufactured with a complete set of New or Remanufactured parts back to Original Equipment New Specifications. 

2 Year Warranty Unlimited Mileage Parts & Labor Warranty

$2,000 Core Deposit until we get the old engine core back in buildable condition. 

Some applications may be only available on an "Build Owners Core".
Complete Drop-in engines Include:
• Block 
• Crankshaft
• Rods 
• Oil pump
• Crank gear 
• Cam gear
• Piston assemblies 
• Camshaft
• Head 
• Front gear cover
• Flywheel housing & seal 
• Oil cooler
• Oil filter assembly
• Water pump 
• Gasket set
• Valve train (lifters, pushrods & rocker arms)
• Lift pump 
• Injection pump
• Low & high pressure lines 
• Injectors
• Fuel filter assembly 
• Damper pulley
• Turbocharger 
• Thermostat
• Intake cover & connection 
• Exhaust manifold
• Thermostat housing 
• Oil pan
• Oil pickup tube 
• Gear cover & seal
• 4B/3.9L & 6B/5.9L come with air crossover tube if required