We carry a large assortment of aftermarket, genuine parts for Cummins 4BT 3.9 and 6BT 5.9 diesel engines, including turbochargers, overhaul kits, injectors, and lift pumps.

For more information on B Series engines, please visit our Cummins engine specifications page.We carry a large assortment of aftermarket, genuine, and remanufactured parts for Cummins 4BT 3.9 and 6BT 5.9 diesel engines, including turbochargers, overhaul kits, injectors, and lift pumps.

The Cummins B Series is available in 4 and 6 inline cylinders. Because of the popular 3.9 and 5.9 liter models, it is known as the "one liter per cylinder" engine.

Cummins 4090035 5.9L ISB Upper Engine Head Gasket Kit

Cummins 4090035 5.9L Upper Engine Head Gasket Kit

This is a brand new complete upper engine head gasket kit manufactured by Cummins. The 4090035 gasket set is required to successfully replace the blown head gasket on your Cummins 5.9L ISB. If you own a twenty-four valve Cummins 5.9L Common Rail and you're having issues with a loss of heat or high engine coolant temperatures, then it may be time to replace your head gasket.

3804897 UPPER ENGINE GASKET SET - 6B 5.9 (1983-APRIL 2003)

3804896 UPPER ENGINE GASKET SET - 4B 3.9 (1983-APRIL 2003)

4089649 UPPER ENGINE GASKET SET - ISB / QSB / B SERIES

3802363 CYLINDER HEAD GASKET SET - B SERIES

3802362 UPPER ENGINE GASKET SET - 4BT 3.9 (.25 MM OVERSIZED)

3804896S UPPER ENGINE GASKET SET - 4BT

4955229 UPPER ENGINE GASKET SET - B SERIES / ISB / QSB

3802364 UPPER ENGINE GASKET SET - 6B 5.9 (.010"/.25 MM)

4089650 UPPER ENGINE GASKET SET - 6B 5.9 (.010" / .25MM)

3802245 UPPER ENGINE GASKET SET - 6B 5.9 (1983-2003)

2881955 UPPER ENGINE GASKET SET - G5.9 (GAS, 2 VALVE)