im an owner of a w204 c350 but i have a buddy that has a w221 2008 and he wants to start modifying he's looking at the wald sport exhaust and he wants to get an aggressive rear end, but he is required to change the whole bumper out because of which one he wants, he wants the MEC design with the carbon fiber finish like this

http://www.mecdesign.de/new/pricelis...lass_flyer.pdf

has anyone here done this or know of someone who has.
MEC is telling me that if he wants that style he has to get their exhaust but he doesnt like the sound of their exhaust and wants the wald one.