40/35 hybrid
I asked Harry Piers the same question.
I have a 14 cm wastegated exaust housing from my Banks kit.
It's a great candidate for the Piers 35 Hybrid.
I'm getting the turbo from Bruce Harkness.
Fellow TDR member!
Bruce has a great amount of knowledge, and a very powerful truck.
Bruce also sells the variable valet ,which you will probably need with those 370's for around town driving.
SFB