We've put together several power packages utilizing many the parts we offer which are proven to increase horsepower, performance and sound. Most of these packages include custom tuning from Lund Racing. Lund Racing has been tuning Lethal Performance's cars for many years so there's no question as to why we offer such a great product to our customers. These tunes can be loaded onto your vehicle utilizing handheld devices such as the Lund Racing NGauge or SCT X4 handheld programmer. When you order one of these packages the tune if included will be bade specific for your car and the modifications in the package unless otherwise specified. When the parts show up at your door you'll install them as instructed and then flash the vehicle with the custom tune and you're good to go. If you have any questions regarding the power packages we provide for the 2015-2017 Mustang GT please feel free to give us a call and we'll be glad to assist you.