loud

Okay, first been riding for years, currently a ninja 500. I love the looks of the 6r, but I have a few simple questions. What does swapping in r6 cams really do, more power, move the power band up? I do understand the purposes of opening up the exhaust, ie power and volume but I don't...

How much louder is the two brothers exhaust with the power silencer than the stock exhaust? Ordered one and can't wait. I hear it On YouTube but I don't think it does it justice. So how much louder is it?