The 2-Row 42mm core greatly 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. More cooling rows also improve the overall efficiency of the radiator. More cooling tubes means more surface area for the coolant's heat to dissipate from. Each end tank is CNC machined billet aluminum giving them incredible strength and durability. CNC machining offers incredible precision and uniformity. The results are perfectly produced end tanks that perfectly match up with the ends of the 42 mm core. Hand TIG welding joins the tanks to the core creating the strongest radiator on the market for the R33 Skyline. Each radiator includes a 1.4 bar high pressure cap with an embossed CSF logo. High pressure radiator caps raise the boiling point of coolant. This helps protect the system from boiling over at higher operating temperatures. While the radiator is designed to keep the system from reaching such temperatures, it is always good to have extra protection for situations where the coolant gets too hot. The CSF #7219B comes in Black. Also available in a raw billet aluminum finish (CSF #7219).