This Steeda S550 Coolant Expansion Tank for 2015-2019 S550 Mustang GT and EcoBoost, 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 aluminium neck has a built-in overflow
- Integral billet aluminum hose fittings are better looking and less troublesome than screw in fittings