I had long TOR slash cuts on my 2002 america - and I found them to be very tame - there must be different variants or something - with varied baffling.....as soon as I was in 3rd gear (going fast enough to bein 3rd gear) - the wind drowned out the pipes completely (with a half helmet).
with the 20" helix turnouts, I can hear the pipes all the way through 5th - unless it gets extra windy for some reason.