Fluidyne FPS11-YFZ450 Power-Flo Radiator for Yamaha YFZ450 Fits Yamaha YFZ450 04-09 Direct fit design means no installation modifications are required Radiator core is thicker than stock radiator for increased cooling and internal coolant passages are 33 per cent wider for improved flow Billet filler necks, TIG welded tanks and furnace brazed aluminum cores for strength and durability Beaded inlet/outlet hose connections for positive sealing