HH Series 48mm All Aluminum Radiator

The Koyorad HH Series Radiator is engineered as a high-performance, direct-fit replacement for the original equipment radiator in 1994-1998 Nissan Skyline R33 GT-R and GT-S vehicles. Its 48mm "HH" Series core boasts an ultra-high fin density, designed to maximize heat dissipation and maintain optimal engine temperatures under demanding conditions. Koyo manufactures each radiator with precision in their privately owned factories, ensuring quality control throughout the production process. Construction features include a robust all-aluminum core that is hand-assembled and Nocolok-R brazed, with TIG-welded seams for durability. The radiator also incorporates a billet aluminum filler neck and a 1/8" NPT female accessory fitting, complete with a threaded plug, to accommodate aftermarket temperature sensors commonly used with gauges. This direct-fit design allows for a simple installation with no modifications required to the vehicle. Applications specifically include the 1994-1998 Nissan GT-R (R33) and 1994-1998 Nissan GT-S (R33). It is important to note that the factory radiator cap will not fit this aftermarket unit.