Koyo Racing 48MM Radiator: Mazda RX-8 09-11, KOYO-HH062267This brand new application features Koyorad's new 48mm "HH" Series radiator core to maximize heat transfer. Koyo designs and manufactures each radiator with precision; therefore this is a direct fit performance replacement for the stock OE Plastic Aluminum radiator and bolts directly to the factory fan shroud for a quick and simple installation. Koyo has also integrated a 1 8" NPT female accessory fitting (supplied with a threaded plug) to accept