mirrorimg
Well-Known Member
No.technically different, yes, 33mm intake valves, 47cc combustion chamber on the P8R head with a full 84mm bore, so you cannot use it on B18's, it only works on 84mm bore blocks or larger. Was your friend beating 350z's and rsx type-s's with it and a 5spd trans with some bolt on's? It's possible, but the race would have been close, your only lookin at about a 20-30hp increase if that.
Ive got an 82mm block with an 84mm head, using a 84mm headgasket. It will just impede flow slightly because of the pocket created from the larger combustion chamber.
Now if he decides to boost it and it generates a lot of heat, then it may end up developing some hot spots... but from the sound of it, he just wants a basic NA setup.