Mishimoto Racing Thermostat Honda Civic Si 2006-2013 | MMTS-CIV-06

Product Fitment: 

2006-2013 Honda Civic Si

Improve your engine’s cooling efficiency with the Mishimoto Racing Thermostat, designed for the 2006–2013 Honda Civic Si. This performance thermostat opens at a lower temperature than the factory unit, allowing coolant to circulate through the engine sooner and helping maintain cooler, more stable operating temperatures.

By activating earlier than the OEM thermostat, the Mishimoto unit helps reduce high engine temperatures that can occur during spirited driving, track use, or when running modified engines. Lower coolant temperatures can improve engine efficiency and help protect internal components from excessive heat buildup.

Constructed using high-quality materials and designed as a direct replacement for the factory thermostat, this upgrade installs easily with no modifications required. It is an ideal cooling system upgrade for enthusiasts looking to improve temperature control and overall engine reliability.

Features

• Direct fit for 2006–2013 Honda Civic Si

• Lower activation temperature for improved cooling efficiency

• Helps maintain cooler engine operating temperatures

• Ideal for modified or performance-driven vehicles

• Direct OEM replacement for easy installation

• Mishimoto Lifetime Warranty

Specifications

• Activation Temperature: 154°F (68°C)

• OEM Activation Temperature: 172°F (82°C)

• Engine Compatibility: K20 / K24 engines

What’s Included

• (1) Mishimoto Racing Thermostat

• Mishimoto Lifetime Warranty