TPR0018 is a downflow radiator for the Peterbilt 377, 379, 357.
The core measures 36.25" high by 34.5" wide, 2.25" deep. It has a 2.5" inlet at the left and a 3" outlet at the right. There is no integral oil cooler and no filler neck.
It replaces 2 OEM and aftermarket numbers, among them 770046, 770046BT. Searching any one of them will find this part.
On radiators the inlet and outlet positions, and whether the unit carries an oil cooler, decide interchangeability more often than core size does. Two radiators with identical cores are frequently not interchangeable.
