Mishimoto Rockstar Aluminum Coolant Expansion Tank - Subaru Impreza WRX/STi 2002-2007
Although the factory expansion tank does its job of holding coolant, it is made of plastic that is known to degrade over a certain period of time causing unwanted leaks. Additionally, the factory expansion tank is sort of bland looking in the engine bay. Mishimoto has stepped up to the plate by redesigning a coolant expansion tank that not only looks great but adds a much cleaner and streamlined look to the engine bay. Additionally, this tank holds 50% more fluid capacity when compared to the factory expansion tank.
This expansion tank has been fabricated from aluminum and features barb fittings that have been welded into place. It will come anodized in a black finish to provide extra protection against rust and corrosion. Other features include a Rockstar branded radiator cap to top it off.