NONE of the local muffler shops will mess with this. Also, i havent seen one shop that has the round mufflers like the 300sd has in the rear. My center mufflers also have several holes big enough to put a couple of fingers in. i would rather replace the whole thing with OEM stuff. I have read that thread on the straight exhaust put on that SDL. Sounds cool but i'm not interested. I want the car to be as quiet as it can be.