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Cosworth 154 Degree LowTemp Thermostat (Part Number: )
Cosworth 154 Degree LowTemp Thermostat (Part Number: )
Cosworth 154 Degree LowTemp Thermostat (Part Number: )
Cosworth 154 Degree LowTemp Thermostat (Part Number: )
Cosworth 154 Degree LowTemp Thermostat (Part Number: )
Cosworth 154 Degree LowTemp Thermostat (Part Number: )
Cosworth 154 Degree LowTemp Thermostat (Part Number: )
Community Media
Cosworth 154 Degree LowTemp Thermostat (Part Number: )
Cosworth 154 Degree LowTemp Thermostat
Subaru EJ Models (inc. 2004+ STI / 2002-2014 WRX)

Features & Product Details

RallySport Direct is proud to carry the Cosworth 154 Degree LowTemp Thermostat. This part has been designed to improve the cooling efficiency for street or track vehicles. 

Here are the details:

  • Reduces engine temperature by 10 to 15°C compared to standard thermostats
  • Engineered with an optimum temperature range in mind
  • Precisely controls the flow of coolant when the valve opens
  • Works best with a correctly sized radiator and other high-grade cooling components to maximize engine performance
  • Specifications

    Brand: Cosworth
    Gasket Included: Yes
    Opening Point: 154°F
    Mfgr. Warranty: 1 Year
    Condition: New Product
    Return Policy:

    RallySport Guarantee - 30 Days


    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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    REVIEWS & CUSTOMER MEDIA

    1 Reviews
    5 out of 5 Stars
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    Customer Photos and Videos
    Cosworth 154 Degree LowTemp Thermostat ( Part Number: 20021032)
    1 of 1 people found the following review helpful
    Cooler 7 years ago
    BobbyJ
    Dropped my engine temp by 10o. I’m able to run my car that bit harder and for longer. Thanks Rally Sports Direct for the speedy service and delivery all the way to Australia. It took less than 4 days to arrive from the time I placing the order.
      
    Was this review helpful?

    QUESTIONS & ANSWERS

    • Q:   Logan Wolfe2 years ago

      Does this not fit a 2015 STi? Looking to tame my water temp on track.
    • Q: Do i need it ?  Turbo992 years ago

      My 2010 sti is 2.6 cosworth stroker kit and fully modified, my temperature jumps sometimes more than half and I cleaned the radiator and everything is fine so do i need an aftermarket thermostat and it will affect my car or it will be fine for it , i use for track use and daily use
      • 0 of 0 people found the following answer helpful

        A:  This is a lower temperature thermostat meaning it will open up sooner and take the car longer to warm up as well as keep it a little bit cooler. If you desire to have cooler operating temps, then this will help you achieve that.

        Chris W. @ RallySport Direct 2 years ago  
          
        Was this answer helpful?
    • Q: ECU  Mrsniffmonster3 years ago

      With the last being said would it and should the ECU be tuned to use this? I own one but im nervous to install it for a check engine light.
      • 0 of 0 people found the following answer helpful

        A:  Depending on the temperatures the vehicle is regularly seeing a tune may be required. This is going to open sooner causing the vehicle to take longer to warm up, if it does not warm up the ECU will throw a CEL.

        Nick S. @ RallySport Direct 3 years ago  
          
        Was this answer helpful?
    • Q: Proper operating temp?  virgman5 years ago

      I have a 2005 STI with catless turbo back, intake and Cobb stage 2. I don't always push it hard unless it is a track day. Will this cause any issues with the engine reaching proper temp with normal driving?
      • 0 of 0 people found the following answer helpful

        A:  Yes, given this thermostat opens at such a low temperature you will notice that the car will have a very hard time reaching normal operating temperatures. Especially if driven in colder climates.

        Kirill C. @ RallySport Direct 5 years ago  
          
        Was this answer helpful?
    • Q: check engine light   Jesus19915 years ago

      will this lower temp thermostat make the check engine light come on because is lower than factory temp?
      • 0 of 0 people found the following answer helpful

        A:  We have not had any problems with the Check Engine Light being turned on, but if the ECU recognizes that the car is not within normal operating temperatures it may cause the engine to run rich to raise the engine temperature.

        Zach G. @ RallySport Direct 5 years ago  
          
        Was this answer helpful?

    This Part Fits

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