i have both the b16 and b18c1 head,

but what i wanted to know which of these heads

have better air flow or if its just the same

and please, i just need to know which HEAD, not intake manifold has better air flow


Thank you for any information you guys have to give

 

the flow is very close between the two. it just comes down to which one you want to use.

 

My vote would be B16a. Flows a **** hair better, but i just hate the GSR manifold. Really cant go wrong either way.

 

b16 head has a higher flow rate but the b18c1 head has slightly higher compression (correct me if im wrong)