This doesnt add significant amounts of power but it definetlly makes the car pull harder from a stand still. (and makes the whine of the supercharger noticably louder) The superchager in these models is located on the left side of the engine. above it there is a supercharger housing that directs the flow of the air. in side of the supercharger housing there is a supercharger silencer that obviously silences the supercharger but at the same time obstucts the air flow from the supercharger. I beleive there is also a silencer on 99 and previous models but i am not sure. the silencer is just a piece of plastic in the housing that u cant miss. it is held in with three screws. one of the screw is on the outside of the housing. so therefore when u take out that screw make sure you have something to plug it up with. i just used an old nut and bolt i had laying around that happened to fit. and for me no engine check lights have turned on yet.