Stock turbo sizing. T25 or T28

[fullthrottle]

I've searched and keep finding conflicting info about the size of the stock turbos. I was led to believe stock twins on all skylines are. T25 ceramic wheeled turbos. With the exception of n1/r34 turbos which have steel wheels in their t25. Was there an rb26 ever produced with t28s?

[Skym]

There's a list on the internet somewhere with size of wheels, A/R, etc.

I think the confusion is they have a T25 flange on exhaust housing with T28 core, wheels to suit.

As far as I know, rebuilt (hybrid turbo) R32 GTR turbo's use a GTi-R (SR20DET) T28? CHRA + machined stock turbo compressor, exhaust housings (similar in size to R33? N1 turbo's). I think SR20DET turbo's are T25 flange. Some reckon you probably can fit SR20DET turbo's x2 with mods to oil feed, etc, but not sure about that.