Probably useless information, but I weighed a few items as I was removing them from my car:
A/C condenser assy (condenser, fan motor, shroud) 6.8lbs
each B-pillar is 2.3lbs, a CF B-pillar is about 0.5lbs
each side vent is 2.5lbs, a CF side vent is about 0.5lbs
each rear quarter panel is 7.6lbs
each front quarter panel is 4.6lbs
each front shock and spring assembly is 11.4lbs
each rear shock and spring assembly is 13.0lbs.
and if you're considering 14" Brembos:
each F-50 caliper is 9.2lbs
each 14" disc is 16.2lbs
does anyone have the weights of OEM calipers and rotors?