CSF 96-02 Toyota 4Runner (2.7/3.4L) Heavy-Duty All-Aluminum RadiatorBrand CSF Part Number 7210 Category Cooling Radiators Condition Brand New Original Manufacturer Packaging The 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 found on many other aluminum radiators. Additionally, the super efficient multi louvered fins