Yea they do stangs all the time. There is a extremely slight howl at exactly 65 mph, but you can barely hear it. It only happens at that mph. Other than that it is silent. I think its pretty normal because of the gear size. I've heard that the taller the gear you go with, the more likely chance that there can be noise even if they are set perfectly.
__________________ 2004 3.9L/auto
-Mac CAI, 73mm Mass Air
-Dual Flowmaster 40s, H pipe, 2.25 in pipe
-42% Underdrive Pulleys
-SCT Tuned
-4.10 Gears & Trac-lok |