Do you think there would any kind of problem with putting a B20 head onto a B18B1. Probably not the smartest thing to ask, but im not quite sure, and friend keeps asking me the same question all the time, so i might as well see if im right.

 

b20 heads are the same as the b18. both are p75 heads. for the exception of the b20 p8r which will also work on a b18. so there is nothing wrong with using a b20 head on a b18 block

 

Holy crap, this question was just asked last week.

Lock it up please.

 

lol

 

are the intake manifolds the same?? and i should use the b18b head gasket correct. also there is a hole on the top of the valve cover on the b20s(smooth valve cover) that the ls doesnt have is there something i can get to plug it thank you

 

any body?

 

try not to use the p8r head, its worth well beyond what an ls head is(you can sell it for more and just by an ls head and make some cash) and provides no extra gain to an ls shortblock. its used and hunted by b20 owners and the combustion chamber is 84mm vs the ls's 81mm which will hammer the ls's compression and hurt performance by a bit! it does have vtec sized valves though! I doubt yours is one but the even though the chances are slim I would check! the letters will be coded on the head above the exhaust ports!

 

well i have to use it i got it from my brother and i need my car running. i went with the ls gaskets, and what would the number on the head be?? its a b20b4 head

 

ls intake will bolt up to it correct and i should use ls gaskets

 

B20b4 is a north american B20b, so you have a P75 head same as a B18b. Use the B18b manifolds and gaskets.

 

thank you i wasnt for sure