Honda TRX450R Performance Thermostat - Mishimoto - Low Temp 79C/174F - `05-`14. This Mishimoto low-temperature thermostat is a direct-fit replacement for Honda TRX450R/TRX450ER models from 2005–2014, designed to help your quad manage operating temperature in hot conditions and under sustained loads.

Engine cooling can be stressed during long idling or low-speed, high-load riding; this thermostat opens at a lower temperature (79°C / 174°F) than stock to begin coolant flow sooner and help reduce peak engine temperatures. It installs like the OEM unit and carries the Mishimoto Lifetime Warranty for powersports parts, offering a practical option for riders who run hard or live in warm climates.

Features

• Lower opening temperature: 79°C / 174°F
• Direct-fit replacement for Honda TRX450R/TRX450ER (2005–2014)
• Mishimoto MMTS-HON-05L part number
• Backed by Mishimoto Lifetime Warranty
• Performance-oriented cooling behavior for high-load use

If you have questions or want help confirming fitment, call us directly — we’re happy to help. We have two service locations offering installation and customization: Austin, Texas and the Los Angeles, California area. Call: 512-982-9393 (TX) or 562-981-6800 (CA).

If you are thinking about purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov