Quote:
Originally Posted by Chrome383Z
Corsa extreme without NPP doesn’t utilize the valves. So there will be no change in sound.
NPP open would sound different as you are basically bypassing the muffler. I guess I’m a little confused with the question.
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I think he is asking if the NPP version (when open fully) has a different sound/tone than the non-NPP version (which of course is always "open")