I was checking out Big Gun's site for exhaust systems for the WR. And there are two kinds, the race series and the quiet series. Now there is obviously a difference between the two, but which do you offers the most optimal power gain? Any "race" pipe will be naturally louder, as the non-race pipes will always be quieter. This isn't really the issue though. I use the WR for trail usage and never and race tracks. I'm hung up on which one would be a better candidate for my ride.