Nicolas Farinas

So. I'm on the hunt for a E63 exhaust. I've had my e550 for a few months, never had a mb before. So sorry for the questions..2012 e63 came turbo'd. So I'm guessing the exhaust diameter is way bigger then a 2010 e550.. so if I put these on, I would have a big back pressure issue and I'd lose performance..am I correct? Besides e63 pipes, would any other model give me the sound I'm looking for? Anybody know off hand the diameter of e550 tubing vs the e63? I'm having a helluva time locating something...I did find a complete assembly online ,brand new Oem for about 800 with half off shipping... It makes it real hard to buy mufflers only for more then 300 for the left and 3 more for the right... From the research I've done..just straight piping will sound like ****... I'm about to purchase a tune from OE, will that change the exhaust note at all?