What's louder, HFC's or RTP's???
 

Do Resonated Test Pipes tend to run quiter or louder than High Flow Cats? Anyone have any feeback that's run both? What brands were you running?

louder from what I understand. but even the resonated TP's have the rasp.

I've run both and the Resonated Test Pipes were louder. Oh they were both Kinetix.