Just got through installing the bassani x pipe with removable cats (cats removed) and the mac 3" catback with the preditor diablosport tuner....first impressions= holy shti this thing is f-ing loud.....let car warm up...and go for a little "spin" this thing pulls like a mofo!!! i cant believe the power i picked up.......i think it may be a little too loud and i might have to install the cats....but it sure is a beast!!