what is a better performance oriented set up a stock gsr motor or a gsr bottom end with a b16 head i heard b16s get better flow through them let me know techies

 

This question has been answered before, but here I go again.

If you plan on leaving the block internally stock then stick with the GSR head. You will lose static compression by using the b16a cylinder head which in turn will lose power. But stock for stock, the pr3 casting will flow better than the p72.