​Rid your 2007-2014 WRX/ S-GT or 2003-2009 Legacy GT engine bay of the eyesore that is the stock expansion tank, and replace it with the Mishimoto aluminum coolant expansion tank. The all-aluminum, fully welded construction of the Mishimoto expansion tank does more than dress up your engine bay. This tank also offers increased durability during repeated cold and hot transitions, and leak-free welded CNC barb fittings. In addition, the Mishimoto aluminum coolant expansion tank offers a 22% increase in fluid capacity over the factory expansion tank.

This direct-fit expansion tank upgrade is compatible with the stock Subaru and Mishimoto radiator caps, and is available in Stealth Black. As with all our products, this expansion tank includes the Mishimoto Lifetime Warranty.

This expansion tank may not fit with the stock air intake "S" hose, an aftermarket intake is recommended for the best fit. Mishimoto offers both the Performance Air Intake, and Performance Race Intake which are perfect for this application!