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Old 10-24-2002, 11:01 PM   #1
Jase
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Urathane VS Fiberglass

If you are about to buy a body kit for your e30 and it is a daily driver, what is better Urathane or fiberglass( pros and Cons)
cost is obvious..but why?
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Old 10-25-2002, 01:31 AM   #2
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Urethane is MUCH more durable, it will flex, and is not as prone to stone chips as fiberglass. I have a urethane bumper add on, and on the first day driving with it, I drove it over one of those concrete parking stops, the bumper folded in, but when I backed out, the bumper popped back out. If this were fiberglass, it would have been in pieces.

Fiberglass is a very rigid substance, especially in cold weather. If your driving your car in winter, I highly suggest you steer away from it, hits from ice and snow will crack it. Its much cheaper to produce than Urethane though.
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Old 10-25-2002, 02:14 PM   #3
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fiberglass is cheaper than urathane.....
true that urathane is more flexible but depending on who makes the fiberglass and how it's done.... it cane also be close to the flexibilitie as the plastic ones......
i've seen Fil (Eurostyle) scrape his fiberglass front on cement block and keeps going and it didn't crack or bust apart or anything it just dug into the fiberglass just like it would with the plastic ones....

i heard fiberglass is good if you DON"T brace it to death... allow it room to bend and flex...
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Old 10-25-2002, 04:04 PM   #4
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I would suggest getting either a urethane or abs plastic front bumper as that will take most of the scrapes or bumps if you ever encounter any. The sideskirts, and rear bumper can be fiberglass as they usually dont make contact with anything. MAYBE the side skirts might scrape over certain speedbumps, but if you're carefull you shouldn't have any problems.

As for spoiliers, i would suggest that if you get fiberglass to reinforce the underside of it, or what I like to do is drill through the spoiler lengthwise and install a metal rod inside the spoiler to give it strength, and then i fiberglass over the holes and paint it.

Reason i do this is because with fiberglass, especially with larger spoilers like the reiger infinity ii spoiler, they begin to sag in the middle over time, especially after hot days, and the sagging can sometimes be permenant or cause cracking =/
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Old 10-25-2002, 05:22 PM   #5
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There is no substitute for urethane, get that. It will cost a litte more but its worth it in the end and you wont regret it!
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Old 10-25-2002, 08:31 PM   #6
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yeah, I wouldnt mind having a fiberglass spoiler, its not like yoru going to get stone chips back there, and its light.
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Old 10-25-2002, 10:36 PM   #7
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Thanks for all the great replys. I am wondering if eurostyle sells urathane or fiberglass. I don't want it to break...
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