I have a Hypertech Power Programmer 3 just like new, in the box with manuals. This programmer allows you to adjust your top-speed limiter, engine RPM rev limiter, cooling fan on/off temperatures, transmission adjustments, speedometer/odometer/part throttle shifting corrections for larger tires, and you can change it back to stock anytime. Its an excellent programmer and will help with fuel economy if adjusted properly. I have no use for it since I sold the vehicle it was in. And yes, it was returned to stock settings. I want $150 shipped to your door. I think it was around $300-$320 new.