What intake mani can I use on a b16 head, on a b20 block, yes I did my research, but I got a little stuck, help, thanks. ps,

 

Are you trying to stay with stock Honda parts?

 

soo your doing a b20vtec setup with a b16 head?

 

As-far-as Intake Manifold B16 Heads has the same Bolt pattern as the B18C5 (Type-R).
GS-R (B18C or C1) Mani's will not fit on B16 Heads.

Your B20 Block: All B-Series Motor has the same bolt pattern when it comes to Exhaust Manifold/Headers. Hope this helps.