Generation IV External Engine - Stailess Rockers

I have been seeing a lot of these around for the LS3 and I'm not sure what the advantage of them would be?
Why all the sudden is stainless showing up and are they better than Alum.??
They are making them from 17-4PH Stainless and that worries me because if you don't heat treat it after machining you don't get the desired tensile strength.
From what I know it's a softer stainless so it can be machined easier.

Any opinions?

I haven't seen any stainless rockers for L92/LS3 applications where you finding them. There are a bunch of junk Chinese parts on Ebay for 1st Gen and some LS1 applications. Post a link....

Sounds crazy to me why use a metal that would not naturally soak in oil.

steel rockers like the pro magnums from comp are far stronger than aluminum, and they actually make them lighter at the tip. i ran them for years on my old style sbc spinning it to 7500 pretty much every time i drove it (over 15k a year) and never had a valvetrain issue.

Look at Jesel, they make a very nice steel rocker. Big money though.

steel rockers like the pro magnums from comp are far stronger than aluminum, and they actually make them lighter at the tip. i ran them for years on my old style sbc spinning it to 7500 pretty much every time i drove it (over 15k a year) and never had a valvetrain issue.

Ya, I ran there Pro mags on my LT1 but the ones they make for the LS3 aren't available due to a redesign issue according to Comp them self's.

These are for the LS1:
http://www.prwonlinestore.com/stainlesssteelgmls1rollerrockerkit-0234611-1-1-1.aspx