If you are looking to get the most performance out of your new S550 Mustang GT 5.0L power-house, then replacing the restrictive factory throttle body with a BBK 90mm Throttle Body is a good place to start.
This BBK S550 Mustang GT 90mm Throttle Body was designed to flow more freely than Ford's stock throttle body. This larger throttle body will increase the overall performance of your 5.0L GT S550 Mustang. You will see close to 15 HP increase with this bolt on BBK throttle body.
This throttle body is CNC machined from high-quality 356 aluminum casting to ensure OEM quality and a perfect fit. There is no fabrication needed in order to install this throttle body, just mount it on your 2015 Mustangs 5.0L engine and you will be making more power in no time!