I just got my Dynatech Headers and MBRP Exhaust installed 2 days ago. I was surprised on how loud it actually was after the installation was complete. It sounds incredible when you start it up. The car rumbles now and my girlfriend always knows when I'm coming home (this might not be a good thing, hehehe). I love the chrome tips that stick out the back and the fact that you can actually see the headers through the wheel well. Needless to say, I'm very happy with the appearance of the Headers and Exhaust. There is a huge problem though, DRONE! I had to go out of town the first night about an hour away and by the time I reached my destination, I had a splitting headache. The low frequency (or Drone) at 50-80mph is unbearable. I wish I would have known about it before I bought the MBRP. I was talking to a Performance Dealer today and he told me that the Corsa Exhaust is the only one that does not have the Drone problem. He said that people were bringing their Challengers back in that had the Magnaflow, MBRP, and SLP exhaust installed to swap it out for the Corsa Exhaust. I might have to replace it with the Corsa down the road, we'll see. There is one more problem, my check engine light came on! The Performance Dealer told me that after I tune it with the Predator, it will go off. The computer is just really confused with the new Headers and Exhaust system installed.
If anyone out there is thinking of getting some headers, I suggest Dynatech. If anyone out there is thinking of getting a new exhaust system, beware of the Drone!