The GM 2051 all aluminum radiator is an exact fit, OEM replacement for 1948 Cadillac 62 Series convertibles. Manufactured in the USA using controlled atmosphere brazing, the epoxy-free core has two rows of 32 mm tubes and measures 21.75 inches from header to header, 18.87 inches from side to side, and 2.75 inches thick. Aluminum tanks are TIG welded to the core to provide the strongest possible bond. Each unit is individually tested prior to shipping and guaranteed to be 100% leak free.