Cooling System

Your engine is cooled by a mix of ethylene glycol and water, circulated through a radiator by a belt-driven pump. Proper maintenance of your Subaru cooling system is critical to keeping your engine happy and healthy! Browse our Subaru cooling system parts below to find exactly what you need for your WRX, STI, or BRZ, from radiator hoses to water pumps, radiator caps to thermostats.

If you're looking for coolant, that's over in the Fluids and Cleaners section.

Perrin Coolant Overflow Tank Quick View
Perrin Coolant Overflow Tank $160.00
Subaru OEM Water Pump 2002-2005 WRX Quick View
Subaru OEM Water Pump 2002-2005 WRX $116.00

Subaru OEM Water Pump 2008-2014 WRX Quick View
Subaru OEM Water Pump 2008-2014 WRX $145.95

Mishimoto Radiator 2008-2014 WRX & 2008-2017 STI Quick View
Mishimoto Radiator 2008-2014 WRX & 2008-2017 STI $285.00 $360.00
Sale
Mishimoto X-Line Radiator 2008-2014 WRX/STI Quick View
Mishimoto X-Line Radiator 2008-2014 WRX/STI $355.00 $440.00
Sale
Subaru Water Pump Elbow Quick View
Subaru Water Pump Elbow $17.00

Subaru Water Return Line Turbo-to-Head 2008-2014 WRX Quick View
Subaru Water Return Line Turbo-to-Head 2008-2014 WRX $19.00
TurboXS Billet Aluminum Radiator Stays 2015+ WRX/STI Quick View
TurboXS Billet Aluminum Radiator Stays 2015+ WRX/STI $40.00
Subaru 2002-2016 WRX / STI Water Pump Bypass Hose Quick View
Subaru 2002-2016 WRX / STI Water Pump Bypass Hose from $6.85

COBB Coolant Overflow Tank 2008-2017 WRX / STI Quick View
COBB Coolant Overflow Tank 2008-2017 WRX / STI $145.00
GrimmSpeed Radiator Shroud with Tool Tray 2008-2014 WRX/STI Quick View
GrimmSpeed Radiator Shroud with Tool Tray 2008-2014 WRX/STI $75.00

GrimmSpeed Radiator Shroud with Tool Tray 2002-2007 WRX/STI Quick View
GrimmSpeed Radiator Shroud with Tool Tray 2002-2007 WRX/STI $75.00
Killer B Dual Reservoir Washer/Coolant 2008-2018 WRX/STI Quick View
Killer B Dual Reservoir Washer/Coolant 2008-2018 WRX/STI $318.00
Aisin Water Pump 2002-2007 WRX and 2004-2017 STI Quick View
Aisin Water Pump 2002-2007 WRX and 2004-2017 STI $90.00 $141.00
Sale

Aisin Water Pump 2008-2014 WRX Quick View
Aisin Water Pump 2008-2014 WRX $110.00 $159.00
Sale
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