This Steeda S550 Coolant Expansion Tank for 2015+ S550 Mustang GT, EcoBoost, and V6 is a direct bolt on replacement to Ford's OE two-piece coolant tank. It allows you to run a larger amount of coolant throughout your radiator. 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.

Product Benefits:

• Direct bolt-in replacement
• Fabricated aluminum for strength, plastic tanks may fail after repeated high heat situations
• Uses factory vented cap, bleeds pressure like the factory intended
• Billet aluminum neck has a built-in overflow
• Integral billet aluminum hose fittings are better looking and less troublesome than screw in fittings