Add some additional reliability and engine bay styling with a Mishimoto 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 matches the ! The Mishimoto coolant expansion tank is engineered for perfect fitment in the 2002–2007 WRX and the 2004-2021 STI.