How easy do you think based on the undercarriage information we have, to turn the 135i into a quad exhaust car? (preferably close to equal length piping)
http://www.rsportscars.com/foto/12/bmw135i08_141600.jpg
http://www.1addicts.com/forums/showthread.php?t=1340
To me it seems that the muffler would be fairly hard to work with (and flip upside down) because of it's downward facing inlet. Does anyone have some ideas?