top of page


  • Direct fit for the 2008-2021 Subaru WRX and STI
  • Installs in under 30 minutes
  • All-aluminum, fully welded construction for maximum durability during repeated cold and hot transitions
  • Dipstick allows for proper cold coolant levels
  • Available in polished or anodized black
  • Includes black Mishimoto fill cap
  • Mishimoto Lifetime Warranty


Reliability comes hand in hand with the Mishimoto Subaru WRX/STI Aluminum Coolant Expansion Tank. Stock coolant expansion tanks are prone to fail after years of constant temperature variations. Mishimoto's 2008+ STI / WRX coolant overflow tank is constructed from durable, TIG-welded aluminum for optimal durability and longevity.


Included with this STI / WRX coolant overflow tank is a CNC-machined dipstick to allow for easy checking of coolant levels. With the choice of two finishes, polished and anodized black, this tank will have no problem matching the style of your engine bay. This STI/WRX coolant overflow tank fits perfectly with the stock or Mishimoto's STI/WRX radiators and comes along with the Mishimoto Lifetime Warranty so you can have peace of mind!!



Fits the 2008-2021 Subaru WRX and STI




Mishimoto Aluminum Coolant Expansion Tank 2008+WRX/STI

    bottom of page