Actually, it helped out a lot smoke. I can't compare it with a custom tune because I've never had one, but it helped out a lot. Also to answer your question, yes the custom tunes are less expensive than the Flaspaq. However, there are pros and cons with both. IF YOU DECIDE to get the damn flashpaq, it has the calibration feature on it. But you are right smoke, it would be cheaper to get a custom tune and just calibrate it then.

 

I went from 245/75R16 to 265/75R16. The size change is basically an optional stock size.

 

Yes 02redchevy it is an option, but if your computer is not configured correctly for that tire size it will still be off as the 265 is 1 inch taller.