Just curious as i owned Kawasaki Vulcan where the previous owner had removed the PAIR plumbing. He did nothing else and claimed it ran better and stopped making gunfight at OK corrall-impressions on deceleration. (I can of course only attest to the latter since i never drove it with PAIR plumbing intact.)
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Exactly stop the popping on over run. My R3 in standard form popped on over run it was muffled by the silencer but was there. With my open pipe its annoyingly loud, this should stop it. So anyone fitting a loud pipe will have the same issue.