Is Seibon's stuff lighter than stock?
 

I know that their carbon stuff is mostly carbon backed by fiber (not real 100% carbon with UV gloss coat). So does it save weight over the stock bits?

Namely items like this....

http://www.intensepower.com/secafi1vefrf.html

They seem to be the only ones making carbon anything for body panels that have a gloss finish. C-West makes some nice 100% carbon UV gloss coated lips etc, but no body panels. ??

if you're talking about the CF fender then yes, they are a bit lighter. If you're talking about CF hood then it's almost the same.

if your talking about cf hoods, i wouldn't expect much weight savings being that the OEM is aluminum (light as it is OEM) versus seibon carbonfiber (layered on fiberglass skeletal structure; rather heavy in the world of CF)

Seibon parts are wet carbon fiber so you wont get much if any weight savings with those fenders. I have the same fenders but in fiberglass in stock. Im willing to price match as well.
Jim