The Peterbilt 377, 378 385, 387 388, and 389 Wide Charge Air Cooler is a practical and efficient solution for your Peterbilt truck. With a core height of 37 1/4 inches, core width of 33 3/8 inches, and a depth of 2 inches, this air cooler is designed to fit most Peterbilt 377, 378, 385, 387, 388, and 389 models. It features a 4-inch inlet and outlet, and is sold individually. With OEM and aftermarket numbers such as 44PB2239X, PET17715-N, and more, this air cooler is a reliable choice for your truck's cooling needs.