no one on here has an s52 so we cant tell you how it ill sound. but I will tell you this. if your car looks like a basic stock e39 and your exhaust is loud I think I would laugh I your car if I randomly saw you. I would make my car look like a nice fast car before making it sound like one. my m54 has a electronic cutout valve and at the flip of a switch I have a straight pipe from the cats down. its loud as hell and has an amazing tone. and man does it turn heads. but again man I wouldn't want a loud car if doesn't look like it should be loud...