stock muffler loud would be fine with me. I’ve tried to find one but everybody seems to want ridiculous prices for a muffler that’s just lying in their garage and will probably never be used again. If I have to pay a lot I‘ll just look for an aftermarket on the lower end of the decibel scale.To loud is what is going to the problem-every body has a different level of what loud is-but the catalytic converter is in the muffler so any non stock muffler is going to be A LOT louder-I had a cheap Amazon pipe on my CB300F I had a few bikes back tried every which way to make it so it was just a bit louder than stock--no luck removed it-