If you are running a larger aftermarket radiator this coolant expansion tank will help to keep your S550 cooler when pushing it on the track.
Also a lot of people don't appreciate the look of the OEM tank, and Steeda give you the option of a billet silver finish or a powder-coated black to help give your engine bay some more style.
Product Benefits:
Part number:
555-0600 Black
555-0601 Silver
Fitment: S550 Mustang - all
Choose options