[wildstringer]

I also have speed density on my mustang. I have been told hat with speed density the computer will adjust air and fuel back to factory specs . so if you add more with a better intake the computer will null out the changes. now with MAF the computer will recalibrate after all changes. just disco the battery and it will allow the computer to acccept add ons. not to mention i ve been told idle quality is better with MAF