The engine is not symmetrical. One cylinder ( the right one ) is forward...so the exhaust is not the symmetrical as the suspension parts. The different position of one cylinder made this happened.
I have a 2012 M3W...but probably i made a mistake with my presentation thread...
I'm sorry for my English but I hope I was clear

:))

Morgan 4/4, Caterham Seven, Ginetta G27, TVR Chimaera