Most everyone has been buying the repros from Hawks, they are fiberglass and considerably lighter. Yeah you can tell its not the factory original when you tap on it, but other than that is was a perfect match when I replaced mine on my old TTop car. Have to have your favorite paint shop match the paint for you. It is suspected that water getting repeatedly washed under the spoiler cause the mounting stud within the foam to rust or swell causing it to crack. I think mine cracked on the TTop car at around 12k miles around 2008 and it was always garaged kept and never saw rain, but did get washed every few weeks to get the dust off. The hardtop car I have now never gets water in that area, and the previous owner never washed it on the rear section forcing water under it, and it has not cracked, still original.