Product Overview

• Displacement: 3.9L (239 cu in, actual 3,922 cc)
• Engine Family: Cummins B series
• Configuration: Inline-4 cylinder, OHV
• Bore x Stroke: 102 mm x 120 mm
• Condition: OEM used, compression tested
• Availability: Multiple configurations in stock (4BT NA and 4BTA turbo)
• Shipping: Free freight to all 50 states via crated freight, 5 to 10 business days
• All 4 cylinders pressure-tested with results shared before payment
• Injection pump type documented (Bosch P7100, VE rotary, or industrial CAPS)
• Aspiration confirmed (naturally aspirated 4BT or turbocharged 4BTA)
• Fitment verified against your specific swap project
• Zero core charge required, your existing engine stays with you
• Backed by a 15 day replacement warranty against internal defects