the p8r head came on some kinda wagon and a car called the orthia and some random cars across the water in "jdm" land they are completey different castings compared to the p75 head which is the head most b20's actually have on them with a little difference in cam. The p8r has 33mm vtec valves and 84mm (p75 81mm) combustion chambers which means it has the ability to make more power than your standard b18 head no matter if you go boost or motor.