How much weight will i actually save? and do the better ones help in aerodynamics? and can i put my MSA front air dam on the thing? Really interested in cutting weight on my 280z. I plan on also replacing the back hatch glass with lexan, removing the spare tire, swapping out the stock doors with some from a 71 240z(much lighter) Putting myself on a rigorous diet(wanna loose 30 lbs) I then plan on relocating the battery to the back of the car. Wonder how much weight i'll cut. Any estimates of what my "wet" weight will be? I now weigh 235lbs at 5'4".