Aluminum Watercooler Radiator for Yamaha R1 2004-2006Fit for Yamaha YZF R1 2004 2006. Replaces OEM number: 5VY 12461 00 00. Core thickness: 26mm 100% aluminum construction provides increased heat and pressure tolerance, improved heat dissipation, and cooling efficiency. High efficiency brazed aluminum cores. Significant increase in fluid capacity. Welded to maximize strength. Required no modifications to install and direct bolt on replacement. Including: 1 radiator. Cap is also included.