Hey does anybody here have the SCT X Cal 3 tuner? and if you do, what kind of performance gains did you see with 93 octane? I have an 01 v6 automatic w/true dual flowmaster 40's, h pipe, and CAI. Im probably gonna get 3.73 gears and t-lock installed so i figured i might as well get a tuner to go with it. I know that the tuner will firm up shifts, increase fuel mileage and add hp to my car, but is it really worth it? And they say it has user adjustment but i wouldnt want to adjust the wrong thing. Is it pretty straight forward or what? Sorry, I dont really know much about custom tuners and I cant seem to the information that i want, other than "you'll love it" haha. Thanks in advance.