Mishimoto has developed a patented X-Braced Dirt Bike Radiator for the Yamaha YZ450F.Upgrade your stock Yamaha YZ450F radiator with a Mishimoto X-Braced Aluminum Dirt Bike Radiator to receive 30-percent greater cooling efficiency.The built-in corner bracing ensures the highest level of durability to riders on the track or off road.All Mishimoto Powersports radiators are made with high-quality brazed aluminum cores and are precision TIG welded for extreme durability.The Mishimoto Yamaha YZ450F Radiator is designed as a direct OEM fit to ensure smooth installation.