I'll get one up when I get home from work, about 6:30 or so. I have O/R prochamber and Mac flowpaths. I'll telll you right now, it's not bad, ie not too loud. I love it. I think the muffs would matter more, as far as the sound inside the car, than what the midpipe is. I had the catback first and the O/R PC made it a little deeper and a little louder. I'll get the vid up for you, but just buy one.
Well computer nerd I am not. It took me 3 beers and about 2 hours to find the file, get the anglefire thing going and upload that SOB.
Anyways, here it is. http://www.angelfire.com/az3/03gtinfla/InsideCar.mpg
Yes that is the green light of death. Stupid TC
Hope this helps, but like I said before, just buy it. You'll like it.
I guess today is not my day to be smart at all. I just re-read your post and you wanted O/R prochamber with Magnapacks. I have flowpaths. Sorry about that. I have a 2nd smaller clip. http://www.angelfire.com/az3/03gtinfla/insidecar2.mpg
Maybe I could help you out in another way though. I just ordered my Longtubes today and I already have a shorty Prochamber waited to go with them. This leaves me with one slightly used, 4-5 month old, prochamber for the stock headers. See where I'm going with this.
Shoot me a pm if you want to. I won't have it off my car untill I get the other setup put on my car. Guesstimate is 2 weeks. I live in Florida so it's prolly not rusted at all. I can get some pics up when I get it off.
Let me know.