I was wondering if anyone did this install for the M37? https://www.mishimoto.com/infiniti-g37- ... n-kit.html

I would think that it would also be a direct fit since the engine is the same no?

What do you guys think?

Mishimoto makes some nice stuff, but you don't need to spend that much to get quality

IIRC, a guy posted how he used oil catch cans that he bought off Fleabay and hoses he also purchased to fab up his own system.
Yep: pcv-oil-catch-can-install-m37x-t607241.html

You can get 2 decent catch cans for less than $100 PLUS, in the color that might complement your engine bay, nice quality braided hose line shouldn't be too costly, where you end up setting up where your catch cans will sit will determine how much hose you need. You'll need fittings for attaching your hose line, and a couple of L brackets should help you bolt up your cans to a reasonable spot.

Ought to be less than $200 all in.