- Improve your WRX STI's cooling capacity to keep that competitive edge.
- Don't get slowed down by your stock cooling system when your WRX STI is far from stock power.
- Give your engine bay that extra pristine look that everyone will love!
- Direct fit for the 20022007 Subaru WRX and 20042016 Subaru WRX STI
- 50% greater capacity than stock plastic expansion tank
- 100% 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
- 2015 - 2016 Subaru WRX STI Base
- 2015 - 2016 Subaru WRX STI Limited
- 2015 Subaru WRX STI Launch Edition
- 2004 - 2014 Subaru Impreza WRX STI
- 2007 - 2014 Subaru Impreza WRX STI Limited
- 2010 Subaru Impreza WRX STI Special Edition
- 2002 - 2007 Subaru Impreza WRX
- 2006 - 2007 Subaru Impreza WRX Limited
- 2006 - 2007 Subaru Impreza WRX TR
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% 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.