Mishimoto Racing Thermostat

2003–2019 Dodge/Chrysler/Jeep/Ram 5.7L, 6.1L, 6.4L Hemi Engines

Part #: MMTS-JED-06L

Overview

The Mishimoto Racing Thermostat is engineered specifically for high-performance Hemi engines found in Dodge, Chrysler, Jeep, and Ram vehicles from 2003 to 2019. Designed to replace the factory thermostat, this low-temperature 180°F thermostat improves cooling efficiency by opening earlier than the stock 203°F unit. By allowing coolant to circulate sooner, it helps maintain optimal engine temperatures, reducing the risk of overheating and enhancing overall engine longevity.

Whether your vehicle is stock, cammed, or equipped with forced induction, the Mishimoto Racing Thermostat ensures your Hemi engine stays cooler under demanding conditions. This reliable upgrade supports sustained performance and protects your investment during spirited driving or track use.

Key Features

Built to deliver superior cooling performance, the Mishimoto Racing Thermostat offers the following benefits:

• Activates at a lower temperature of 180°F (82°C) compared to the stock 203°F (95°C) thermostat
• Promotes earlier coolant flow to reduce high engine temperatures
• Compatible with 5.7L, 6.1L, 6.4L, and 6.2L Hemi engines
• Designed for use in a wide range of Dodge, Chrysler, Jeep, and Ram models from 2003 to 2019
• Improves engine reliability and performance by preventing excessive heat buildup
• Precision-engineered for consistent and reliable operation under racing and street conditions
• Includes Mishimoto’s lifetime warranty for peace of mind

Construction & Design

The Mishimoto Racing Thermostat is crafted with high-quality materials to withstand the rigors of high-performance applications. Its robust construction ensures durability and long service life, even under extreme thermal cycling. The thermostat’s calibrated spring and valve mechanism are engineered to open precisely at 180°F, providing consistent cooling activation without premature wear or failure. This design helps maintain stable engine temperatures, which is critical for maximizing power output and engine longevity.

Installation & Fitment

Installation of the Mishimoto Racing Thermostat is straightforward and designed to be a direct replacement for the factory unit. It fits perfectly in the cooling system of compatible Dodge, Chrysler, Jeep, and Ram vehicles equipped with 5.7L, 6.1L, and 6.4L Hemi engines from 2003 through 2019. No modifications are necessary, making it an ideal upgrade for enthusiasts seeking improved cooling without complicated installation procedures.

What's Included

• Mishimoto Low Temperature Racing Thermostat (180°F)
• Lifetime warranty documentation

Ideal For

This thermostat is ideal for performance enthusiasts, racers, and daily drivers who want to enhance their Hemi engine’s cooling efficiency. It is especially beneficial for vehicles subjected to high loads, aggressive driving, or modifications such as camshafts or forced induction that increase engine heat. By maintaining lower operating temperatures, it helps protect engine components and sustain peak performance.

Fitment Summary

• 2003–2010 Dodge Ram 1500 5.7L Hemi
• 2003–2010 Dodge Ram 2500 5.7L Hemi
• 2003–2010 Dodge Ram 3500 5.7L Hemi
• 2004–2019 Dodge Durango 5.7L Hemi
• 2005–2010 Chrysler 300C 5.7L Hemi
• 2005–2010 Chrysler 300C 6.1L SRT8
• 2005–2008 Dodge Magnum 5.7L Hemi
• 2005–2019 Jeep Grand Cherokee 5.7L Hemi
• 2006–2019 Dodge Charger 5.7L Hemi
• 2006–2010 Dodge Charger 6.1L SRT8
• 2006–2008 Dodge Magnum 6.1L SRT8
• 2006–2011 Jeep Grand Cherokee 6.1L SRT8
• 2008–2010 Dodge Challenger 6.1L SRT8
• 2009–2019 Dodge Challenger 5.7L Hemi
• 2011–2019 Chrysler 300 5.7L Hemi
• 2011–2019 Dodge Challenger 6.4L 392
• 2011–2019 Ram 1500 5.7L Hemi
• 2011–2019 Ram 2500 5.7L Hemi
• 2011–2018 Ram 3500 5.7L Hemi
• 2012–2014 Chrysler 300 6.4L 392
• 2012–2019 Dodge Charger 6.4L 392
• 2012–2014 Jeep Grand Cherokee 6.4L SRT8
• 2015–2019 Jeep Grand Cherokee 6.4L SRT

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.