Jamie the full spec is detailed towards the bottom of post #1

It uses one wheel size smaller than the RS6 assembly. I spoke to both Turbo Dynamics and Mark at CR Turbos about each spec as well as Bill and the general consensus was it should still flow enough for
280 BHP figures with the right accompanying mods which I have.
Mark at CR seemed to think the only reason they use the RS6 assembly is because they get them at a good price and customers simply demand the biggest wheels possible. Bit of a gamble perhaps but got to be in it to win it - I didn't see the point of selling it just to buy a CR unit anyway, even Mark talked me out of the idea and I can't praise his customer
service highly enough.
I've not seen any RR results for one of these turbos before with the mods I'll be running. Mikey KC is running the same turbo and guessed it to be 270 BHP when still using a restrictive exhaust and FMIC so it's anyone's guess at the moment. I'm hoping a combination of a good FMIC setup and WMI will allow me to squeeze a few ponies out by advancing the ignition timing but that remains to be seen when it's mapped.