TWR0002 is a downflow radiator for the Western Star 4900 EX, 5900 WA-WB, 6900 WC, model years 1995 to 2002.
The core measures 33.75" high by 35.125" wide, 3.0625" deep. It has a 2.5" inlet at the top right and a 0" outlet at the bottom left or right. There is no integral oil cooler and no filler neck.
It replaces 65 OEM and aftermarket numbers, among them WES84, 1A14292, 1A14359. 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.
