ok finally i got the car done. had the headers in for like almost a week and a half and was waiting on the x-pipe. BBK had them on back order so i got one from summit. installed it and the stang was back in buisness. my first impressions was it sounds different. i think the way to explain it is that in lower RPM's it has a very low rumble kinda like flow's and as soon as you step on it that bassani sound comes back. its kinda wierd but it does also sound a little quieter. the SOTP meter deffinetly read something and it was very good. one of the best mods to do.