I have one of the shorter (I wouldn't call it a stubby, it's just not as big as the normal ones) Beowulf simple round stainless cans on my bike and I'm happy with it. Nice crisp rumble, sounds best at low rpm. Hasn't notably improved performance on my otherwise stock bike, but then I never for a moment expected it to. Not tried without the baffle though, seems plenty loud enough as it is, much more is a bit anti-social
