The GMPP exhaust, aka the magnaflow exhaust, I can assure you does not sound like a "fart cannon" and as noted above actually sounds better than the 3.8. I was quite impressed with the result. I tried posting some pictures through photo bucket and was unsuccessful but based on the sound clips on youtube of the various exhaust sounds on the GT's there, I am WAY ahead of the game with this exhaust on the 3.1L.