The Stainless will be $322.99....and I'll ship for free for board members. You also pay no tax since you're in AZ and I'm in CA. As far as DB level...I'll check and see if they've measured it and let you know. I know Gibson's known for high quality performance with minimal noise. I just switched out and there is a very NOTICEABLE difference in sound, the two brother's was so loud it hurt your ears after riding for any length of time....and I couldn't ride it around the neighborhood as I didn't want rocks getting thrown my way. The Gibson has a nice, deep note to it. I even put their exhaust on my Ford Powerstroke....it's awesome, sounds great and just a little louder then stock when you get on it.