A friend of mine is a R&D technician at BORLA industries, the same BORLA that makes exhaust for the Turner motorsports BMW racing team.
He has made a custom cat back exhaust for my M6 and my friends F10 M5.
Unfortunately I was incredibly impatient and ended up buying a Eisenmann race exhaust with gloss black oval tips.
I would like to find someone who wants a brand new full cat back system from Borla with dyno'd results of 40WHP (based on my buddies stock M5) in exchange for a Vorsteiner rear diffuser and front lip.
OR I can send you my Eisenmann race exhaust system (roughly 800 miles on it) in exchange for a Vorsteiner rear diffuser and front lip for my M6.
Great opportunity to have an exhaust system of your choice for cheaper than normal.
Send me a PM if interested. If you are local I can have the exhaust system thrown on your car at the BORLA industries warehouse for free by one of their techs.
Thanks.