Koyo 00-09 Honda S2000 Hyper-V Core RadiatorKoyo performance radiators are designed to improve your cooling systems efficiency and capacity with a direct replacement performance radiator. Koyo radiators feature a thicker core with a more efficient fin design to improve coolant flow and improve temperature drop across the radiator surface. Koyo is the largest radiator manufacture in Japan and uses the best materials such as aircraft quality aluminum and heli arc welding and soldering to produce