PDI Big Boss Charge Air Cooler - Peterbilt 377-379 (1987-1994)

Replace a leaking or damaged charge air cooler on 1987–1994 Peterbilt 377–379 trucks with this PDI cooler. Mounted in the charge-air path between the turbo and engine, it removes heat from the compressed intake air before that air reaches the cylinders.

Air passing over the outside of the cooler carries away heat from the charge air inside. The resulting cooler intake air is denser, while an intact core keeps boost air in the system. It is the charge-air heat exchanger for the truck application above; match the core dimensions and pipe connections to the installed unit.