Mishimoto 68 Degrees Racing Thermostat 06-11 Honda Civic Si | 68°C Opening Temperature | High-Flow Cooling Thermostat

Overview

The Mishimoto 68 Degrees Racing Thermostat for the 2006-2011 Honda Civic Si is designed to enhance your engine’s cooling efficiency, especially under the increased thermal loads of modified and turbocharged setups. By opening at a lower temperature than the factory thermostat, it allows coolant to circulate sooner, helping to maintain optimal engine temperatures during spirited driving or track use. This thermostat is ideal for enthusiasts looking to reduce the risk of overheating and improve overall engine reliability.

Engineered with precision, the Mishimoto racing thermostat is crafted to meet the demands of performance applications. Its 68°C opening temperature is significantly lower than the standard 82°C, providing earlier coolant flow without sacrificing engine warm-up time. Mishimoto’s commitment to quality ensures consistent operation and durability, making it a trusted upgrade for Honda Civic Si owners who push their vehicles beyond stock limits.

For Civic Si owners, maintaining stable engine temperatures is crucial for both performance and longevity. This thermostat helps prevent excessive heat buildup that can degrade engine components and reduce power output. By integrating this thermostat into your cooling system, you gain better thermal management that supports aggressive driving and turbocharged power levels, ensuring your Civic Si runs cooler and more reliably.

Features & Specifications

This Mishimoto racing thermostat is engineered for the 2006-2011 Honda Civic Si and features a 68°C opening temperature. Constructed from high-quality materials, it delivers improved cooling efficiency for enthusiasts seeking enhanced thermal control and engine protection.

• Brand: Mishimoto
• Product: 68 Degrees Racing Thermostat 06-11 Honda Civic Si
• Part Number: MMTS-CIV-06
• Fitment: 2006-2011 Honda Civic Si
• Material: High-grade metal alloy
• Finish: Natural metal finish
• Construction: Precision engineered, high-flow design
• Origin: Made in USA
• Opening Temperature: 68°C (154°F)

Key Benefits

• Performance: Opens at a lower temperature to reduce engine heat buildup under high load
• Durability: Built with quality materials to withstand rigorous thermal cycling
• Fitment: Direct replacement for 2006-2011 Honda Civic Si thermostats for seamless installation
• Cooling Efficiency: Promotes earlier coolant flow to maintain stable engine temperatures
• Reliability: Helps prevent overheating and protects engine components during aggressive driving

What's Included

• 1× Mishimoto 68 Degrees Racing Thermostat for 06-11 Honda Civic Si
• Installation instructions

Installation & Compatibility

Installation of the Mishimoto racing thermostat is straightforward and typically DIY-friendly for those with basic mechanical skills. It replaces the factory thermostat directly without modifications. Standard hand tools are sufficient for removal and installation. No tuning or additional modifications are required to benefit from this upgrade. Always verify fitment for your specific model year and trim before purchase.

• Professional Installation: Recommended for those unfamiliar with cooling system service
• Modifications Required: None
• Verify Compatibility: Confirm fitment for 2006-2011 Honda Civic Si models

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