Yo! I bought the SLP Loud Mouth, Long Tube Headers, and X Pipe. I got to hear the Loud Mouth compared to my 2 chammber Flows. My Flowmasters sounded like a tin can compared to the Loud Mouth. The only thing is that The Loud Mouth is quite at idle, only loud when you stomp. I like my Stang as loud as possible but that's just me. The Loud Mouth sounded like some Saleens I've heard. Anyway, putting in the loud mouth tomorrow. My headers and X pipe picking up from SLP on the 10th. Next I've got to get the KB SC in to complement this whole exhaust setup!