Post by
onosqv »
https://forums.nicoclub.com/onosqv-u507.html
Wed Feb 23, 2005 1:38 pm
in additional to what the other guys said,
urethane is more oem material. Your front stock bumper is a urethane bumper I believe (from what I remember).
However, urethane is also heavier.
Although it may not be much, replacing front bumper, rear, and fenders w/ fiberglass is lighter, so even after adding side skirts, your car "should" be a little lighter, and at worse about the same. So a lil .00001 hp increase for you.
Yes urethane will crack less easily because it bends more -> so neg side is paint will tend to chip off easier.
Get a carbon fiber body kit and call it a day .