Koyo (Koyorad) is Japan's benchmark for performance cooling, supplying high-capacity aluminium radiators to the tuning and motorsport world. The range includes multi-core aluminium racing radiators, OEM-replacement cores and oil coolers engineered to tame heat in high-output turbo and engine-swap builds, with popular fitments for the Subaru WRX/STI, Honda S2000, Mazda RX-7 and Nissan platforms. Black Hawk Japan stocks the full Koyo cooling range, sourced direct from Japan.
