Mishimoto Racing Thermostat Gen III Hemi 5.7L / 6.1L / 6.4L | 180°F Opening Temperature | High-Performance Cooling Thermostat

Overview

The Mishimoto Racing Thermostat Gen III is engineered specifically for high-performance Hemi engines, including the 5.7L, 6.1L, and 6.4L variants. Designed to replace the factory thermostat, this component plays a critical role in managing engine temperature by opening at a lower threshold of 180°F compared to the standard 203°F. This earlier coolant flow helps maintain optimal operating temperatures, reducing the risk of overheating during spirited driving or demanding conditions.

Mishimoto’s approach to thermostat design focuses on precision engineering and durability, ensuring consistent performance under high thermal loads. The Gen III racing thermostat is crafted to withstand the rigors of both stock and modified engines, including cammed or forced induction setups. Its construction and calibration reflect Mishimoto’s commitment to quality and reliability, backed by a lifetime warranty that underscores confidence in their product.

For Hemi owners, maintaining cooler engine temperatures translates to improved longevity and sustained performance. By reducing thermal stress, this thermostat supports better combustion efficiency and helps prevent heat-related component wear. Whether on the street or track, the Mishimoto Racing Thermostat Gen III offers a practical upgrade to keep your Hemi running cooler and stronger.

Features & Specifications

This Mishimoto Racing Thermostat is engineered for 5.7L, 6.1L, and 6.4L Hemi engines and features a 180°F opening temperature. Constructed from high-quality materials, it delivers enhanced cooling efficiency for enthusiasts seeking reliable temperature control and engine protection.

• Brand: Mishimoto
• Product: Racing Thermostat Gen III Hemi 5.7L / 6.1L / 6.4L
• Part Number: MMTS-JED-06L
• Fitment: 5.7L, 6.1L, 6.4L Hemi engines
• Material: High-grade metal alloy
• Finish: Natural metal finish
• Construction: Precision engineered, durable design
• Origin: Not specified
• Opening Temperature: 180°F (82°C)

Key Benefits

• Cooling Efficiency: Opens at a lower temperature to reduce engine heat buildup and maintain optimal operating temperatures.
• Engine Longevity: Helps prevent overheating and thermal stress, extending the life of engine components.
• Performance Support: Ideal for stock and modified Hemi engines, including cammed and forced induction setups.
• Durability: Built to withstand high thermal loads and repeated cycling without failure.
• Warranty: Backed by Mishimoto’s lifetime warranty for peace of mind.

What's Included

• 1× Mishimoto Racing Thermostat Gen III Hemi 5.7L / 6.1L / 6.4L
• Installation instructions

Installation & Compatibility

Installation of the Mishimoto Racing Thermostat Gen III is straightforward for those with basic mechanical skills and standard hand tools. It replaces the factory thermostat directly without modification, making it a practical upgrade for enthusiasts looking to improve cooling performance. No special tuning or additional modifications are required to benefit from this thermostat. Always verify compatibility with your specific Hemi engine variant before installation.

• Professional Installation: Recommended for those unfamiliar with cooling system components
• Modifications Required: None
• Verify Compatibility: Confirm fitment for your specific Hemi engine model

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