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Koyorad performance radiators are designed to improve the efficiency and capacity of your cooling system with a direct replacement performance radiator. Koyorad radiators feature a thicker core with a more efficient fin design to improve coolant flow and improve temperature drop across the radiator surface. Koyorad is the largest radiator manufacturer in Japan and uses the best materials such as aircraft quality aluminum and heli-arc welding and soldering to produce one of the strongest and most reliable radiators.