I have a dynoport silencer on my 220. I don't know which model, but from what I saw on their website, they only make two (one spark arrestor, one non spark arrestor) and mine is the non spark arrestor model. It's not terribly loud, but it's louder than I'd like a woods bike to be. Keeping the packing fresh helps, but not enough for my tastes. I think if you're riding in an area where you're concerned about noise, it's just a bit too loud.