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Mishimoto Aluminum Coolant Expansion Tank – 02-07 WRX / 04-16 STI


Mishimoto Aluminum Coolant Expansion Tank – 02-07 WRX / 04-16 STI


  • Direct fit for the 2002-2007 Subaru WRX and 2004-2016 Subaru WRX STI
  • 50-percent greater capacity than stock plastic expansion tank
  • 100-percent aluminum, fully-welded construction for maximum durability during repeated cold and hot transitions
  • Leak-free welded barb fittings
  • Fits with stock and Mishimoto radiator caps
  • Polished aluminum finish matches the Mishimoto Subaru WRX/STI Performance Aluminum Radiator
  • Mishimoto Lifetime Warranty



Authorized Dealer


Add some additional reliability and engine bay styling with the Mishimoto Subaru WRX/STI Aluminum Coolant Expansion Tank. Stock coolant expansion tanks are prone to failure after years of constant temperature variations. The Mishimoto tank is constructed from durable, TIG-welded aluminum with barbed fittings for optimal durability and longevity.
This expansion tank provides a 50-percent increase in capacity compared to the stock unit. It features a polished silver or anodized black finish that will look great in your engine bay, and it and matches the Mishimoto Performance Aluminum Radiator! The Mishimoto Coolant Expansion Tank is engineered for perfect fitment in the 2002-2007 WRX and the 2004-2016 STI!
As with all our products, this expansion tank includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship.


  • (1) Aluminum Expansion Tank
  • Mishimoto Lifetime Warranty


Additional Information

Weight N/A
Dimensions N/A

Silver, Black


  • 2002-2007 WRX
  • 2004-2016 STI


Installation Guide

Install Guide