(cool) they come with silencers. I figured i would have them in most of the time, unless i want to let the neighbors know when i am going to leave for workDa 6 said:make shure you have a shop keep the stock pieces case you need to go back stock If you thought SRT with exhaust mods was loud...wait till you put the canisters on. Maybe you might like it..just be prepared to invest in dynamat like I did for trunk and under rear seats...