With some 5.9L Cummins trucks, the factory heater grid is removed in favor of a higher flowing intake manifold for increase performance. That can be an issue if you live in colder climates. The factory heater grid pre-heats the inlet air to aid in starting the engine. Re-install or replace a failed heater grid with this factory Cummins Replacement Heater Grid to start your engine with ease on those colder days. This is a factory direct replacement part and is thoroughly tested to ensure proper operation. Installs using factory hardware and factory style wiring connections. Bolts, wiring, and gaskets are not included. See related parts below.