I had fiberglass bumpers on my car, but deicded to replace them out of concern for safety after I'd seen how easily a fiberglass bumper gives at even a 5 mph bump. I took my steels (aluminum supports) to a local welding shop and one of the guys filled and smoothed them for $100. after that they were off to the body shop and sanded and sprayed with ecthing primer then a couple coats of black and clear. $400 later they look fantastic, 10x beter than fiberglass, and whats an extra 50 lbs. going to hurt a 3400 lbs. car? If a car doesn't see a whole lot of street action fiberglass bumpers are great but it's up to who ever is driving it. Dan