A lot easier to find small amounts in many places than just trying to save in chunks. That being said more info would be helpful. Intended purpose etc. BTW those small amounts can usually be had on the cheap. Holes drilled here, bolts cut there etc.
light rims and tires is one of the best places...battery in back helps little, fiberglass anything will help, not cheap but im sure u catch my drift...lexan is cheap too if u get from a glass company. hell i buy in bulk, then trim myself. winshild i think was about 40 bucks
Nasty street car foundation, if all goes good. The car has Summit's Street Warriors, two bottles in the trunk, battery mounted in spare tire well. On the list is: gut the bumpers, fab lighter supports, remove sway bar, and search for places to trim. No luck on finding glass parts for Grand Prix, and not at lexan stage... Yet!
Here are some of the things I've done to my GP which save weight:
-aluminum bumper braces front and rear
-remove sound proofing
-manual steering box (S10)
-remove front sway bar
-remove power antenna
Things I have planned:
-remove power seats
As you can see, most of the weight loss comes from removing things you don't want/need anymore.
Gutting= doors, fenders, trunk, bumpers, interior, a/c and heater stuff. If you want interior to look stock, still gut everything, take everything out from behind dash that you dont need, and put it back in empty, same with doors, just cover your gutted doors with the plastic door panels.
Find a manual steering box or rack, control arms front, rear, upper and lowers
Brakes= front and rear again
Aluminum is good everywhere
Fiberglass " ditto "
JUST GO OFF ON IT, IF IT FAST ENOUGH TO NEED A CAGE IT WILL RE-SUPPORT CHASSIS.