Front bumper support is mounted onto the radiator support. Depending how soft the accident is, I'd think the radiator support would bend before the frame does.
Bumper supports I'd say weigh around 8+ lbs. I had to use some muscle to pick it up and I'm not weak sauce...
From heaviest to lightest parts: (All weights are low balled. Sorry for not having a scale.)
-Radio, Amps, speakers, and after market sub. box (Approx. 35++ lbs)
-A/c compressor and Condenser (approx. 20+ lbs)
-Passenger Seat (Approx. 20lbs, Heated and electrical seats weigh more)
-Spare Tire and Tools (Approx. 17lbs)
-Using Smaller Tires (lost 4 lbs on each wheel)(Total of 16 lbs)
-Bumper Support (approx. 8lbs)
-Sound Bar (approx. 6 lbs)
-Passenger and Drive Side Windows (Approx. 3 lbs each)(total of 6 lbs)
-Front and Rear Windshield Wipers Motors (approx. 4 lbs)
-Steering Wheel (approx. 3 lbs)
Not going with a titanium exhaust anymore. I've seen to many of them with dents along the piping area, which will obstruct exhaust flow...