Mishimoto - Aluminum Overflow Tank - 08-14 Subaru WRX/STI

MishimotoSKU: MMRT-STI-08

Sale price$210.95

Shipping calculated at checkout


Mishimoto - Aluminum Overflow Tank - 2008-2014 Subaru WRX/STI

Get that plastic blob of an overflow tank out of your engine bay. Stock plastic tanks are prone to failure due to repeated hot and cold cycles, and they create a horrible eyesore as they lurk in your engine bay. Mishimoto’s 2008-2014 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 STI / WRX radiators. As with all Mishimoto STI and WRX parts, this overflow tank includes the Mishimoto Lifetime Warranty.

  • Direct fit for the 2008-2014 Subaru WRX & 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

Purchase Includes

(1) Aluminum Expansion Tank
(1) CNC-Machined Dipstick
(1) Mishimoto Oil Fill Cap
Mishimoto Lifetime Warranty


2008+ Subaru WRX
2008-2014 Subaru STI

Engine Codes


Chassis Codes



6061 Aluminum


After a few hot and cold cycles, Mishimoto recommends checking the dipstick on the expansion tank to confirm proper coolant level.


Silver or Black



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