Koyorad’s 48mm “HH” Series ultra-high fin density radiator is a direct replacement form the factory unit and offers maxium heat transfer from your cooling system. A proven performer worldwide, Terra Firma is proud to offer the quality Koyo brand in our Nissan Skyline R33 GTR, GTS25 and R34 GTT cooling line up. Each HH Series features a all-aluminum radiator core that is hand assembled, Nocolok brazed, then TIG welded by hand with the finest aluminum available. These are just a few characteristics that have earned Koyorad Radiators their excellent reputation in performance radiators. Koyo has also integrated a 1/8” NPT female accessory fitting (supplied with a threaded plug) to accept temperature sensors typically included with aftermarket temperature gauges. Don’t trust your GTR or GTST’s cooling system to a no name brand, Terra Firma only offers radiators with a proven track record such as these Koyorad’s.
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