[Aussie Mike]

Truth be told that manifold doesn't flow as well as the factory LS6 manifold.

The only real advantages it has (apart from the looks) is that it's easier to plumb for direct port nitrous and can be more easily ported to match the heads. This is a bit of a moot point though since the LS1 intake ports are huge and there's not much to be gained by making them bigger.

Cheers