I was in the same boat as you having a 16cm ex housing and wanting to use it. I bought a used HX35 charger and added the 60mm comp wheel with the large diameter measurement, I had to machine the housing 60 thousands or so to get it to fit. This set up is much like HTT stage 3 kit. It pulls well for towing, boost psi to around 38 and alot lower EGT's than the stock charger for my fueling. I believe I'm around the 400-425 HP level now. This was the least expensive way to get into a bigger charger for me. I sold my stock one and ended up into it about $300. 00 or so. Lots of bang for the buck, good luck