I have a DiabloSport tuner (U7145) for a 2007 - 2009 mustang GT, V6, or GT500. It is in excellent condition and is UNLOCKED which means you can use it on your car without having to pay DiobloSport 130 dollars to take the VIN lock off of it. You will see a noticeable increase when you hook it up and tune your car (even a stock one). I bought it off my brother who had a 2007 and now has a 1999 cobra. I was going to get a 2008 but ended up getting a 2010 and it will not work with my cars year. These sell new for 300 - 350 all day long and this only is in like new condition. It comes with the tuner, cable, original box, and instruction book. If you want to hook it up to your computer and download tunes from DiobloSport you can get the cable you need from radio shack for like 20 bucks. Call or email me [email protected] with any questions or call Neil 843 725 8359.