Mishimoto 08+ Subaru WRX/STI Polished Aluminum Coolant Overflow TankGet 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+ 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