Originally Posted by flexbrah
I have that in the low 2k RPM range as well but only when I'm accelerating. As soon as I'm cruising, you can't even hear it. I love the low RPM drone though... I think it sounds good. But then again, I'm used to listening to a boxster s with a fabspeed exhaust... now THAT drones.
I installed mine last night, and it behaves exactly same way; some drone 2-2.5k rpm during acceleration. Not sure it needs some break-in period. Tips are about 1" out, and I may try to make them stick out little more to see.