Hi Hunter, thank you for your quick reply. I just read that in the E63 M6 there were no charcoal filters in the European cars, only in the US cars. Do you know if that's still the same in the F12/F13?
Do the Eisenmann ovals have valves on the exhausts? Same as in the photos in this post
http://www.6post.com/forums/showthread.php?t=808341 ?
I cannot send private messages as I am just new to the forum, but could you let me know how much you are asking for the Eisenmann exhausts?