@@sandeepsidhu16 yeah that's what I read on forums too, but in my case I just asked for J-pipes and the guy made whatever he could lol. I had the same guy do J pipes on my previous c55 (same exhaust setup) and in that car they worked way better. I mean 0 drone. Unfortunately it's not around anymore, so I can't give a good answer on how long they should be and where to position them for the perfect result.
