Just fitted a Nitron shock

[PieEater]

Doesn't have to be loud, as long as it's road legal your neighbors won't have any reason to object. I have a Fuel can and am happy with it, baffle in and the bike makes 127HP (Full Monty), not much difference from standard when it comes to noise maybe a bit of extra bass. Baffle out and 134HP, I'd say quiet enough to trundle through town and adds more character to the bike on the open road in terms of sound and performance. So yes a less restrictive can makes a difference, I can't say how restrictive the standard can is but I'd say more than it needs to be.