The Moroso coolant expansion tank for 2005–2010 Ford Mustang includes a built-in overflow and is a direct bolt-in replacement designed to integrate with factory cooling plumbing. It restores reservoir function while providing a tidy overflow path, helping keep coolant levels in check and simplifying service for Mustang owners seeking an OEM-style replacement with integrated overflow management.
Moroso 05-10 Ford Mustang Coolant Expansion Tank (w/Built-In Overflow) - Direct Bolt-In Replacement