06FORDMUSTANGGT

Which hand held tuner is more popular? Diablo or SCT Xcal 2? If so which do you recommend for my 06 Mustang GT.

howarmat

depends on what your local shop uses if you get a dyno tune....the popular choice wont matter if he uses the other. If you dont ever plan on a dyno then a CAI/Combo from Brenspeed or B amachips with a SCT is fine

PLstang

+1 check your local shops before you pull the trigger.

Thurman

+1 howarmat. I had the sct only to find out my tuner only uses diablo.
I now switched to diablo.

06Redfire3V

+1 to what everyone has said but the majority i believe is mostly SCT