I got sick and tired of the sound of the Super 44 I had on my Sierra, so I got a 1 chamber off eBay. I put it on and it sounded great, but since I had just a turn down on it , it resonated so much it gave me a headache. So I got a piece of pipe with a 90 in it and made it exit through the side just before side, and now its awesome. No resonance and pure performance sound. I would upload a video, but I don't have a youtube account.