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Mishimoto Racing Thermostat (96-04 V8)

Item 80224
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Keeps Engine Running Cooler
      • Great for Modified Mustangs
      • Fits 1996 to 2004 4.6 GT, Bullitt, Mach 1 and Cobra


      Run Cooler. The Mishimoto Ford Mustang Racing thermostat promotes greater cooling efficiency throughout your Pony's engine and significantly lowers high engine temperatures produced by modified and forced induction applications.

      More Power. The Mishimoto racing thermostat opens up at a lower temperature 154° fahrenheit (68 C) than the standard OEM factory thermostat 190° fahrenheit (88 C) allowing the coolant to flow through the engine block sooner reducing and maintaining cooler engine temperatures helping to produce more power.

      This Mishimoto Racing Thermostat is specifically designed for use on the 1996 to 2004 Mustangs equipped with 4.6L V8 engine, including the GT, Bullitt, Mach 1, and SVT Cobra.

      Mishimoto's "No Questions Asked" Limited Lifetime Warranty

      Fitment: 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

      MPN# MMTS-MUS-96

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (51)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 51 customers

      Installation Time: Afternoon

      Installation Cost: 0-$100

      • February 09, 2020

        5 2001 GT - seantime Installation Time: Less than 1 Hour

        Cool as a fan

        Item works as it should, keep the Stang cooler, great cheap needed part.

        Helpful (0)
      • September 06, 2019

        4 2003 GT - BenH Installation Time: Less than 1 Hour

        Thermoatat for 2003 GT

        My car was near over heating because the old one was stuck now I can run the A/C and the gauge still sit firmly in the middle. However I did have to use the stock rubber gasket since the Mishimoto one was too bulky.

        Helpful (1)
      • July 29, 2019

        5 1998 Cobra - Giovanni Installation Time: Less than 1 Hour

        Huge difference

        Definitely worth buying never thought this would make a difference but wow never seen my car run so cool

        Helpful (1)
      • June 06, 2019

        5 2004 Mach 1 - IgnacioD Installation Time: Less than 1 Hour

        Keeping cool

        well made easy to install perfect fit and drops the temp by a few clicks!

        Helpful (0)
      • November 30, 2018

        5 1997 Cobra - MartinM Installation Time: Less than 1 Hour

        Perfect for upgrading or replacing OEM

        The thermostat was super easy to install and I’ve been having overheating issues in the past so I upgraded most my cooling system. When I opened the box it came with the thermostat and gasket. The gasket looks kinda weird and didn’t really set well within the housing, so I just threw the gasket to the side and used a basic O-ring gasket and it’s perfect. The moment the car gets to operating temps and I start driving a bit harder the temp gauge will raise a bit and then just drop to right above the O. Loving it.

        Helpful (3)
      • November 23, 2018

        5 2002 GT - wrench002 Installation Time: Less than 1 Hour

        Worked great

        Will of course require setting fan kick on temp lower

        Helpful (0)
      • September 25, 2018

        5 1998 Cobra - Ben Installation Time: Less than 1 Hour

        Mishimoto Racing thermostat 154°

        Works grat for the price. Was having trouble with overheating with my newly bord block was getting up to 230° now it sits at 190°, 200° if I run it hard.

        Helpful (2)
      • September 18, 2018

        5 2003 Cobra - Stormi Installation Time: Afternoon

        Not an exact fit for the Cobra

        If you want to use this on the Cobra you have to modify the provided gasket. I used a razor blade, but in the end it worked and dropped the coolant temp as expected.

        Helpful (0)
      • September 10, 2018

        5 2002 GT - PaulB Installation Time: Less than 1 Hour

        Running cool

        Installed this with a Edelbrock water pump and a mishimoto radiator electric fan almost never runs Awesome stuff to keep you running cool.

        Helpful (0)
      • July 11, 2018

        5 2003 Mach 1 - Brett Installation Time: Less than 1 Hour

        Help run cooler

        Bought it to use in my 2003 Mach1 4.6 DOHC powered Factory Five roadster. It opens at a cooler 155 degF.

        Helpful (1)

      Questions & Answers (7 answers)

      5 Top Rated Questions

      I have a 97 cobra that I'm looking to help make it run a little cooler. I read in a magazine from Sean hyland that 4.6L DOHC like to run around 170-180 degrees. If this is a 160 degree thermostat will it make it run too cool to where a tune will be needed? I'm afraid it will keep the engine too cool when you're driving and keep it in it's "warm-up" mode.

      • The Mishimoto Racing Thermostat will not require a tune, however your best benefits will come when using a tune to modify parameters such as fan on/off times to match the new cooler thermostat.

      Helpful (1)

      Does the gasket need to be removed for installation? If not, the thermostat sits on top of the manifold and not inside, as needed?

      • If you check out the installation guide on the product page under the Installation Info section, you will see that there is a new O-ring with the thermostat that will sit in the manifold.

      Helpful (1)

      At what temperatures should my low and high speed fans be coming on and off to compliment this 160 degree thermostat the best? Also will this thermostat not prevent closed loop?

      Will it fit a 2001 v6

      • The Mishimoto Racing Thermostat will not fit a 2001 V6. It will only fit 96-04 V8 Mustangs

      Helpful (0)

      How does this thermostat effect the heating system in the winter time, will the interior still get as hot?

      • The car will still heat up to the full operating temperature, however, if the thermostat is open, and a high volume of air is passing through the radiator, the coolant flowing through the heater core will be at a lower temperature. If a lesser amount of air is passing the radiator, the heat in the coolant will not dissipate as easy, and the coolant will be a higher temperature.

      Helpful (0)
      Post Your Question
      2 More Questions
      will this thermostat cause issues during cold weather operation? 1 answer
      Is this a fail-safe thermostat? If the thermostat fails it does it in the open position rather then closed. 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Thermostat

      Tech Specs

      Will It Fit My Mustang

      • Bullitt - 01
      • Cobra - 96, 97, 98, 99, 01, 03, 04
      • GT - 96, 97, 98, 99, 00, 01, 02, 03, 04
      • Mach 1 - 03, 04

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