I weighed it once, like 10 years ago? I think mine was 12lbs and my big spoiler was 11 LOL.
Like most things, I doubt it is worth it but somehow my car consists of entirely those things.
There were two different trunks. One was made by a former acquaintance's company; Syndicate Kustomz. I think there was only 5 of them and I don't think he sold any more.
The difference is mine the underside ribs are all cut out. But they did mold in a bracket for the trunk release so if works fine with key or the body side cable release.
Then a vendor in California started making them. I don't think they make them anymore.
I haven't done it yet, but I was thinking about asking first molding to make some. I want to pickup their hood; maybe next year, I've told myself no more random fancy junk until I swap my engine that I got in 2011.