Butterfly valves/silencer on Fast Intentions

Originally Posted by SkyZ

Thanks for the reply,

I am definitely looking for an exhaust change, but i want to be able to silence the car with a switch to sound as if it were running stock even if it meant restricting performance (probably by the #hp gained from exhaust change) for that time being. Not being very mechanically learned, I just wanted to know the possibilities and the drawbacks to having such a system.