SET YOUR CAR

Cosworth 154 Degree LowTemp Thermostat

MODEL # COS1 20021032
Manufacturer Part # 20021032

$109.00

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Description
High performance racing engines require upgraded and improved cooling systems for maximum reliability. One important component of the upgraded cooling system is a thermostat that opens to allow coolant passage through the engine and cooling system at reduced temperature compared to the original equipment thermostat. Reducing the temperature by approximately 10 to 15C compared with that of a standard thermostat, the Cosworth LowTemp Motorsport Thermostat improves coolant circulation through the engine by starting the process earlier than the original equipment thermostat.

Cosworth LowTemp Motorsport Thermostats are engineered with the optimum temperature range in mind for high performance racing use as it is very easy to over cool the engine by either removing the thermostat completely or using a thermostat that is not designed for the specific application. Additionally, over cooling can cause engine damage by preventing critical engine components from reaching their ideal operating temperature, altering the required clearances for safe operation. Another important feature of Cosworth LowTemp Thermostats compared to other brands is the ability to precisely control the flow of coolant when the valve opens. Inferior brands allow the coolant to surge thereby causing unstable temperatures and even temperature fluctuation that can cause severe engine damage and make it difficult to properly tune or calibrate the engine.

When combined with a correctly sized radiator and other high quality cooling system components, the Cosworth LowTemp Motorsport Thermostat will help to safely maximize engine performance by controlling the engine temperature at an optimum level .
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SPECIFICATIONS

Brand: Cosworth
Gasket Included: Yes
Opening Point: 154°F
Mfgr. Warranty: 1 Year
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.
Standard

5

5 STAR
100%
4 STAR
3 STAR
2 STAR
1 STAR
Verified Purchase

Cooler
BobbyJ 4 years ago
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.

  • Q:   Logan Wolfe 1 month ago

    Answer

    Does this not fit a 2015 STi? Looking to tame my water temp on track.


    • A: We are not able to confirm the fit of the 15 STI.


      Jared A. 1 month ago
  • Q: Do i need it ?  Turbo99 2 months ago

    Answer

    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


    • 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. 2 months ago
  • Q: Fitment  Tarek 5 months ago

    Answer

    does this thermostat fit my 2015 WRX STI Limited? I don`t use my car in a track it`s full modified and daily use, here in summer the temperature reaches 113 degree is it recommended or I will have over cooling because I rarely use my car under high acceleration.


    • A: We would recommend just using the oem thermostat and not a low temp thermostat. Although it is a warmer climate, it will still take the car some time to reach operating temperature.


      Tyler.G 5 months ago
  • Q: ECU  Mrsniffmonster 12 months ago

    Answer

    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.


    • 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. 12 months ago
  • Q: installations   Andrews 2 years ago

    Answer

    How to install the thermostat?


    • A: This unit is built to OEM spec, so you can use the factory service manual to install this unit.


      Kirill C. 2 years ago
Subaru Legacy
Base 1990, 1995L 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004LS 1990, 1991, 1992, 1993, 1994, 1995, 1996LSi 1991, 1992, 1993, 1994, 1995, 1996, 1997Sport 1991, 1992, 1993, 1994Alpine Sport 1994GT 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006Outdoor 1994Sun Sport 1994Touring 1994Brighton 1995, 1996, 1997, 1998, 1999, 2000Outback 1995, 1996, 1997, 1998, 1999Postal 1995, 1996, 1997, 1998Outback Limited 1997, 1999GT Limited 1998, 2000, 2001, 2002, 2005, 2007, 2008, 2009L 30th Anniversary 1999Limited 30th Anniversary 1999SUS 30th Anniversary 1999L SE 2003L 35th Anniversary 2004i 2005Limited 20052.5i 2006, 2008, 2009, 2010GT spec.B 2006, 2007, 2008, 20092.5i Limited 2007, 2008, 20092.5i Special Edition 2007, 20082.5GT 2010
Subaru Impreza
Base 1993, 1994, 1995L 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001LS 1993, 1994LX 1995, 1996Outback 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004Brighton 1996, 1997RS 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005TS 2002, 2003, 2004WRX 2002, 2003, 2004, 2005, 2006, 2007WRX STI 2004, 2005, 2006, 2007Outback Sport 2005, 2006, 2007, 2008, 2009, 20102.5i 2006, 2007WRX Limited 2006, 2007WRX TR 2006, 2007WRX STI Limited 20072.5i Hatchback 2008, 2009, 2010, 20112.5i Sedan 2008, 2009, 2010, 2011WRX Hatchback 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX Sedan 2008, 2009, 2010, 2011, 2012, 2013, 2014WRX STI Hatchback 2008, 2009, 2010, 2011, 2012, 2013, 20142.5 GT Hatchback 2009, 20102.5 GT Sedan 2009, 20102.5i Premium Hatchback 2010, 20112.5i Premium Sedan 2010, 2011WRX Limited Hatchback 2010, 2011, 2012, 2013, 2014WRX Limited Sedan 2010, 2011, 2012, 2013, 2014WRX Premium Hatchback 2010, 2011, 2012, 2013, 2014WRX Premium Sedan 2010, 2011, 2012, 2013, 2014WRX STI Special Edition Hatchback 2010WRX STI Limited Hatchback 2011, 2012, 2013, 2014WRX STI Limited Sedan 2011, 2012, 2013, 2014WRX STI Sedan 2011, 2012, 2013, 2014
Subaru Forester
Base 1998, 1999, 2000, 2001, 2002L 1998, 1999, 2000, 2001, 2002S 1998, 1999, 2000, 2001, 2002X 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010XS 2003, 2004, 2005XT 2004, 2005, 2009XS L.L. Bean Edition 2005XT Premium 2005, 2010, 2011, 2012, 2013X L.L. Bean Edition 2006, 2007, 2008XT Limited 2006, 2007, 2008, 2009, 2010Sports 2.5 X 2008Sports 2.5 XT 2008X Limited 2009, 2010X Premium 2009, 2010XT Touring 2011, 2012, 2013
Subaru Baja
Base 2003Sport 2003, 2004, 2005, 2006Turbo 2004, 2005, 2006
Subaru WRX STI
Base 2015, 2016, 2017Launch Edition 2015Limited 2015, 2016, 2017Series.HyperBlue 2016