Manufacturer of aluminum racing and replacement radiators, air conditioning condensers, and racing oil coolers. Koyorad quality begins with their selection of premium OE grade materials such as aluminum, copper, brass, and plastics. Koyo products are not only developed and tested to be resilient to harsh outside elements but also years of under-hood heat cycling as well. Koyorad is a Japanese company established in July of 1956 as Ejiri Radiator repair shop. Twelve years later, Ejiri Radiator established a radiator and oil cooler factory in Nagoya where they began manufacturing radiators. 1970, Ejiri Radiator was renamed to Koyo Radiator Manufacturing and began expanding to branches all over Japan. Koyorad quickly developed into an industry-leading aftermarket radiator supplier worldwide.