QUOTE(SiberianFirestorm @ Oct 3 2008, 09:10 PM)

I do not know the codes, but you would know if you look at it. It will still be silver/gray not rusted. Plus it is 3" as opposed tot he 2" or 2.5" steel stocker.
Matt
Agreed. Rust=steel. Not that bad, considering the issues a lot of LS-1 guys have with the stock aluminum shafts grenading after some mods. Steel is heavier, but stronger.
I'm thinking there isn't an RPO code for the driveshaft material. I DO know that all LS-1 F-Bodies came with Aluminum driveshafts, EXCEPT for the 2.73 cars. They were steel. (I own one...lol)
Pretty sure all LT-1's were Steel.
$.02