I installed the o/r prochambers today. It's a straight fwd install, but can be a PITA. I couldn't get the bolts loose on the drivers side to save my live. I finally had to resort to an impact wrench with an extension. Another PITA is putting the battery tray back on. Two of the bolts would just turn and not tighten. Yes, I was going the correct way. I removed be battery tray in order to access the green O2 sensor.
The sound is interesting. Maganpacks and the stock H-pipe is deeper sounding than O/R prochambers and magnapacks. It's deep, but has some raspiness to it. At start-up and idle it's not any louder than the stock H-pipe. At WOT, it has a little bit higher pitch. If you are looking for the 2V sound, this set-up will not give you that sound. I think it sounds a little bit more like a muscle car.
Vids will go up soon.
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is this the only exhaust mod you have? can't wait for vids.

 

Just O/R prochambers and magnapacks.