it was asked "how extreme?"
Carbon fiber lift off hood
carbon fiber fenders
carbon fiber trunk
remove all seats - install light weight driver seat
remove everything inside the doors (i do believe there is some sort of crash bar in there)
lighter wheels can be had
removal of heater core/radio/dash in general
Ti exhaust
You could probably take a few hundred pounds out of the car easily. Now do you want to take those pounds out?
From 505hp and 3800lbs to 625hp and 3500lbs could be achieved without much effort.
How much that will throw off the balance of the car etc remains to be seen (im a drag racer at heart - weight is weight to me
)