I have a TO4B and a stock S4 turbo. Is there anything I need from the TO4 beside the cold side housing the turbine and the backplate to make a hybrid turbo.

I know there is a few other parts that are right behind the backplate, do those need to come from the TO4 or do I use the ones from the stock turbo.

Any one that has done this I would appreciate your help and Thank you in advance.