If anyone has purchased AND USED this tuner, please respond and let me know what kind of parameters it will change. The superchips website states that it can change multiple variables to increase horsepower, etc. However, right below it, the page state that the "end user" parameters that can be changed are rev limiter, top speed limiter, and rima and tire size. :huh: What's the real deal on this? :VHOT: