The radiator purge plug that comes stock on 2014 - 2017 CRF and 2016 - 2019 KXF radiators is plastic and can be susceptible to melting under extreme riding conditions. During installation, you might also learn the hard way that plastic threads are easily cross-threaded. The Works Connection Radiator Plug avoids both these issues by way of its CNC'd billet aluminum design. CNC-machined from billet aluminum to exacting specifications. Laser-engraved WC logos. Direct replacement for the stock plastic plug. Made in the U.S.A.