I just visited mustangworld's forums. Good god. I think I know more than most of those people. In case any of you post over there, I said MOST. This guy put a post up saying these bigger tips made a big difference in the sound of his car, when he put them OVER his exsisting ones. Then he got a bunch of replies "yeah they do sound better" "cool! where do I get those?" "I didnt see any on ebay!!!" ugh..one person said he was full of bs. nobody listened. I'm never going back! lol. I'd rather learn from the true experts here, than go over there and be considered one.