CSF 03-09 Lexus GX470 4.7L V8 / 03-09 Toyota 4Runner 4.7L V8 All Metal RadiatorThe 2 Row 42mm aluminum core not only increases the fluid capacity of the radiator, but also improves the cores ability to dissipate heat. CSF's Exclusive B Tube Technology increases the heat transfer by approximately 15% over regular oval welded tubes. In addition, the super efficient multi louvered fins maximize airflow through the core for the best possible performance. End tanks are made from high grade aluminum and TIG welded to the core for