I think this is a great product. I ran this set up on my 2004 Mach 1 with full bolts on and it definitely made a huge difference. It added a noticeable amount of power and throttle response for sure!
Let me know if you have any questions or need some assistance in the near future! Our Mustang Experts are here Monday-Friday from 9AM-9PM EST and Saturdays from 9AM-5:30PM EST. If you want to hit them up, their number is 866.727.1266. I can also have one of them call you directly.