Go-wing differences......

Even the originals were not fiberglass. I am sure that the new fiberglass models are fine, but a few years ago I saw one at a Mopar show and that thing looked wavy as it could be. The last thing I wanted was to spend $200 and then not even use it cause it was not straight enough. As for the under trunklid brackets. The factroy Mopar set-up had a bracket that bolts to the inside of the trunk and "supports" the weight of the go-wing so it would not distort the trunklid skin. It had been found that without the under lid supports the wing would lean back and fourth during take off's and stops. Which would put to much pressure on the trunklid skin.

FPAP website states..."blade constructed of an ABS based thermoplastic (a proprietary blend) and is molded in gray (as original)"