I have two lower front fender extensions for a 1969 camaro, im trying to figure out if one of them is GM and the other is aftermarket, whats the secret? Any differences distinguishable between the two other than the fit? Thanks all!

Uploaded some picutres maybe someone knows the difference?

http://i16.photobucket.com/albums/b28/late68100/DCP01424.jpg
http://i16.photobucket.com/albums/b28/late68100/DCP01423.jpg

I am not absolutely sure, but the one on the left (bottom picture) has the bumper bolt inserts that look correct.

the one on the left looks to be gm but right one is definitly aftermarket. you can tell by the bumper bolt inserts nuts.

If I had to choose... the one on the left with the scraped off sticker is the repro.
The right one's stamping marks and edges look more factory to me.

If I knew where I stashed my extensions, I'd look at them and compare them to your pictures.