[HiFlow5 0]

Gears and then exhaust! Those are the first things that should be done to any stock stang. Don't worry about fancy intakes at this point! If you don't already have a good set of gears that would be the first thing to do. Stay away from mac headers! I had a set of mac headers and hated the way mac uses individual flanges on the headers, they warp and never fit properly. Just got my solid BBK's installed and they were much easier! I do have a mac h-pipe and haven't had a problem with that.