you can click the bottom one its actually a video.. altho that's not clear?
wifey ran it out real hard on the first rev, but you get the idea.
it doesn't rasp like the video seems to make it, that's just my cellphone mic distorting.
so all in all, no muffler FTW.. no blat or rasp, good sound not overly loud. little more power/torque easier shifts.