Sorry, I was meaning the compressor wheel. I am thinking about putting a 63.5 wheel in with a P&P for my C10 then a set of S360's or 58's on top of that. I just hope it will not eat shafts, I guess a BOV should help a bunch.There are no upgraded turbine wheels/shafts for the IHI; unless you put an S300 cartridge in it.
The stock waste gate is pretty good on the IHI if you set it up right.
Yellowchevy