Well, my plan now is to go for the quattro GTRS on the quattro manifold, adapter pipe to my existing 3" DP and 100-cell CAT and 3" inlet, which due to the quattro mani will sit above all the gear linkages by 1-2 inches (So Jim @ Star tells me). Even if the PI adapter pipe doesn't quite fit for some reason, it's a simple piece so I can get Meercat to make one up quite easily (Meercat make custom manifolds, exhausts, etc. and have made stuff for Keith Cowie, etc.. I'm going to have the mani and adapter ceramic coated before fitting too.
Sorry Dave!!!
I'll post up pics of the quattro manifold next to my old stock manifold, big difference in them and the turbo does indeed sit higher.