The Alliant AP0058 Intake Grid Heater Gasket for your 1989-2007 Dodge 5.9L Cummins is a direct replacement for your factory gasket. These are used at the connections between the intake elbow, grid heater and intake manifold. Alliant Power recommends replacing this gasket anytime these components are ever removed (i.e. during the fuel injection pump replacement). Applications with no grid heater will require the use of only one of the supplied gaskets while applications with a grid heater will require the use of both.