After reviewing some old posts, and looking at the link provided by John, I'm a bit confused. Magnaflow is advertising a "Catback System". It should be just that; from the Cat's back, right? Not just a muffler. They are also stating gains in both HP and Torque. I guess we'll see when Rob gets one, whether it's a one piece or a 3 piece? $700?? If it drones, it's worth $0.