The BT 8721 all aluminum radiator is an replacement for a 2003 Ford F750 with a CAT 7 Engine. Manufactured in the USA using controlled atmosphere brazing, the epoxy-free core has two rows of 1.00 inch tubes and measures 30.00 inches from header to header, 21.26 inches from side to side, 2.250 inches thick, and 3.00 inches inside the header. Aluminum tanks are TIG welded to the core to provide the strongest possible bond and has a 2.50 inch inlet and outlet. Each unit is individually tested prior to shipping and guaranteed to be 100 leak free.