Since the 135i/335i's new DME/ECU been installed, you can't reflash/piggyback with your new 135i/335i anymore. Unless you want to get caught and void your warrenty. So there is no "I can mod my car to be as fast as M3" or "335i will smoke a M3 with just a piggyback". At least for now, I can have some peace and quiet from the new 335i owners.
http://www.e90post.com/forums/showth...&highlight=DME