Im going off research I did years ago so best to verify. You use the HX35 turbine housing, turbine, and CHRA, with the HX40 compressor and wheel. If Im remembering correctly there is just a bit of work to get the compressor to fit on the CHRA. Loads of info on this procedure just google HX40 hybrid. By the time your done buying two turbos or a mismash of parts to make it work, why not buy the off the shelf version of the hybrid, for the same price as a single HX40?