I have a 2000 100000k 540 manual which I am going to use on the track. (I also have a 1999 540 auto and a 1998 540 manual tourer) My friend and retired keen BMW mechanic Andy has just diagnosed a faulty dual mass flywheel. He advises I source a track day clutch,fit a LSD,upgrade suspension and brakes. All being well I will have a rollcage fitted and fit poly bushes and better anti rollbars. I am a new member and would like to share this process. Any advice,recommendation or specialists for parts and fitting please. I reside near Stonehenge however I would travel to get the best service. Many thanks Paul.