The injector cups in your LB7 Duramax can easilly be overlooked when replacing injectors. The factory cups are know to seize in the head, leak, and even corrode. When this occurs, it often causes over-pressurization of the cooling system that could lead to syptoms of a blown head gasket, damage to the radiator, water pump, and other cooling components. In extreme cases, engine failure can occur if a coolant leak allows for coolant to enter the combustion chambers of the engine.

The XDP Injector Cup Set is a direct fit replacement and comes ready to install with 8 injector cups, and 16 o-rings. One set required per engine.