Just thought I'd pass this along. A pair of 496 aluminum manifolds, no risers on ebay. I know that the guy was going to sell them me for $450.
http://www.ebay.com/itm/221837894348...84.m1436.l2648

I think this are not alloy headers,as the alloy version have separate waterrails under them!
They look exact like standart cast iron later version!
Michael

From what I have read Michael, the iron and aluminum version of these manifolds are the same. Some of the manifolds had a water rail under them but then I think that was eliminated in later versions of the manifold.

It true that only first 496 version has this waterrails! All Later Versions have same partnummer and are cast iron headers!
i never see this version that is for sale in alloy!
Please check partnummbers and pics!
Michael

This is what the guy told me Michael
"i have 1 cast iron set 1 alum set each use different style risers thx dale"

Only the early aluminum models have the water rails. The second generation aluminum units look just like the later cast iron models. The way you can tell them apart is that the iron models have core plugs on the back side while the aluminum models do not. When all said and done the aluminum manifolds are around 50 pounds lighter.

I have two sets of aluminum manifolds WITHOUT the bottom rail. So they do exist.

Yes they exist.
I have two 496 ho one from the end 2003 without the water rails in aluminium and one from 2007 with the steel one.
Both manifolds looks the same !!!!!!.