I would certainly think you could save at least 75 lbs with an M5 hood/trunk lid. I would love to see the M5 tip the scales at around 3500 lbs, but that would be hard without gutting the luxuries . Here are the obvious weight saver possibilities that would retain most of creature comforts:
2 racing seats: ~170 lbs
fikse/hoosier: ~ 50 lbs
drain washer fluid: ~ 15 lbs
CF driveshaft: ~ 25 lbs
LW flywheel: ~ 25 lbs
CF hood/trunk: ~ 75 lbs
CF rotors: ~ 80 lbs
Total: 440 lbs and thats without a significant compromise to luxury comfort. Add the Dinan mods and your getting Viper type track performance.
Any one have any other weight reducing ideas without gutting the car?
Also, what about venting the hood to help keep underhood temps down and possibly add a ram air cutout to the front of the hood, add some hood pins. WOW!!! Guy, I might be interested in the CF hood/trunk from MASHAW.
Doug