[boots]

I have the Rpi Gts soon adding the straight pipe version. The Gts is a great pipe just like the above mentioned pipes. It does not have valves and inside the cabin sound is very nice especially when you get down on it. Its not too loud or too quite. To me, it all depends on what type of sound you are looking for. As mentioned, at their Irvine cars and coffee go there to sample all the various pipes. That will help you out the most. We all have sound bites on here of our pipes and they all are good as you cant go wrong with any of them.