I own a 2016 Ruby Red GT with the performance pack. The only mods I have made to this car is a Mishimoto h-pipe and a new shift knob. I plan to add Roush Axle Back exhaust in the late spring of 2018. Love the car, but like the 2018 even more due to the new features and added power. But they will always make them better, so I will hold onto this one.