All aluminum radiator and silicone hose kit, oil cooler, intercooler and kit for racing auto and motocross autobike. We promise that all our products are made of the best materials and advanced manufacture technique. All our products are 100% fully tested to ensure top quality. All manufactured in a brand new state of the art facility with the same manufacturing process that OEM companies use. The cores of radiator are welded in vacuum brazing furnace, and the tanks of the radiator are welded by TIG, no epoxy. 100% quality assurance tested. We never copy from another company’s catalog or website. Core and Tank: 40MM. If your bike is RM125 Model K/L, please contact with me. This item doesn’t fit but we have that radiator.