would a ported PR4 perform just as good a stock P8R head? im planning to do a head swap on my stock B18B. would be the same if i just send my current head out for a port abd polish job? i know at the end i might spend a lil more $ on this but i dont have to go around searching for a P8R head. would my ported PR4 head perform just as good as the P8R head or still have no comparsion to it?

 

p8r has different valve sizes i believe.

 

p8rs blow pr4s out of the water. the intake valves are 2mm larger (vtec head size), and the chambers are 84mm (not 81mm like pr4s). you can spend a ton of money to get these specs out of a pr4 (2mm larger valves is not easy to do), or you can just get a p8r and spend less money, and have more room for improvement with porting. make sure you use a 2.0l bottom end with it for best results. i plan on building up a p8r to the **** when i do a real build.