Get a new 2005-2009 Mustang coolant overflow tank to replace a cracked, broken, or leaking tank. Choose from our many aluminum overflow expansion tanks. These aluminum tanks are stronger than OEM replacements and are less prone to leaking. Got a custom build? Pick up a 14oz or 24oz stainless steel universal cylindrical overflow tank that comes with everything needed to mount it in just about any location. These tanks fit 2005, 2006, 2007, 2008, and 2009 Mustangs.