Whether you're tearing up the trails or hauling hay in the fields, you need your Honda TRX450R/TRX450ER to stay at the optimal temperature. Long periods of idling and low-speed high-load driving can cause engine temps to creep up if your TRX450R/TRX450ER cooling system isn't maintained with quality parts. Luckily, Mishimoto has you covered with this stock temp thermostat for your 2005-2014 Honda TRX450R/TRX450ER. Our thermostat fits and functions just like stock to restore your TRX450R/TRX450ER cooling system to the way it rolled off the factory floor. Like all our powersports products, this stock temp thermostat for your 2005-2014 Honda TRX450R/TRX450ER is backed by our Mishimoto Lifetime Warranty.