http://youtu.be/FgwIDniQ7as
So this is with the stillen gen 3 intake and fast intentions 18 inch resonated cat back. Obviously this is under full load but you can tell its nice deep and smooth but in no way too loud. Since I've installed mine I've made multiple 6 hot trips in my car with no drone on the interstate. Oh yeah she put down 306 on a dyno jet. This is SAE corrected.