Ultimately the weight goal is just free speed, putting the car on a diet will make the car faster. However the alternative to being lighter is making more power. Or both lighter and more powerful, I guess thats the real goal. Those bumpers save the car, not your life, so I've never had issue with removing them... Really I have always opted for the type 2 msa font on some self made mounts a-la home depot (saves atleast 50 lbs) and the rear low speed collision shocks are heavy pieces too but i always leave the bumper skin on for cosmetics. As far as door skins are concerned thats really in the eye of the beholder, its a chance I have taken in the past but probably wont on this particular car. Im not as young and resilient as I used to be.