Its a T3 flange. It will fit on the standard RB20/25 manifold, however, you need to weld a spacer to the manifold so that the comp cover clears the block. Not a huge job, i got GCG in Sydney to do mine. It would be perfect for an R33 engine id say. Yes, i have receipts; not sure about warranty, i didnt ask at time of purchase. It is quite new though.
Nismoid, Im not sure what you mean by the OLDER style TO4 wheel?? As this turbo is only about 8 months old, and is an off the shelf Garrett item i would have thought its pretty new stuff. I was of the opinion that TO4's were old tech truck stuff, but im not an expert, so best to speak to GCG for that sort of stuff. I thought the 0.82 was 550hp and the 1.06 was 600hp.
Shaun.