Is it possible to retrofit the 370Z intake plenum (kinda like how Motordyne retrofits the 35HR plenum for the 370z for better midrange power) on the 35HR motor? I'm thinking it could be a viable option for some HR owners looking to boost the top part of the powerband.

 

I think after 5 years someone would have already tried it. Why do you want to try that instead of sayZ1's?

 

It could be possible from what I have fitted just need the lower from the 370, along with 370 fuel rails. Or you can slightly mod the plenum to fit on 35hrs lower plenum since the holes are just slightly different basically reverse of a thread a guy did with fitting the 35hr upper to the 370 lower. Essentially making his own m370.