I always said I would be one to leave my Mustang stock besides adding dual exhaust. I just love the sound. Then I decided to go with a CAI (BBK from AM) and now I'm hooked. I'm looking for some new bolt on performance upgrades outside of a tune which is already in the works. All I have right now is the BBK CAI and MAC axle-back true duals. Any suggestions? Supercharger is out of the question for now.