DONT use the stock silencer... its designed for the smaller piping, and would defeat the purpose of getting an exhuast. Get a high flow silencer... or even two... IF WE HAD SOUND FILES of Kai's you could hear what it sounds like, BUT havn't been able to pull that one yet... w/o a silencer your head would probably explode if you ever went on a trip...
Not my recomendation...
