NonVtec Honda Forums • View topic

intenseneal · **Posted:** Sat Jun 05, 2010 9:47 am

I know the P8R head off a B20z has larger intake valves (33mm) than the P75 head and it flow alot better. Will a P8R head work on a B18b block? Is it worth swapping out the P75 for the P8R? What head gasket would I use, the B20z gasket or the B18b? I would be putting a set of Crower 402 cams in it.

betojr82 · **Posted:** Sat Jun 05, 2010 6:23 pm

it is a cheap upgrade u can say. and yes it will fit on a b18b ls block. as for the head gasket u have to buy it for the year of the block is not the head.

intenseneal · **Posted:** Mon Jun 07, 2010 10:45 am

Ok thanks. Should I get the head milled to get the combustion chambers closer to the b18b bore size or will it matter??

redxiii · **Posted:** Mon Jun 07, 2010 11:25 am

It's cheaper just to modify the oem 3 layer head gasket into a 2 layer.

Esoteric Image · **Posted:** Wed Jun 09, 2010 6:49 pm

^^ well, It will raise CR, but IDK with the 33mm valves what the piston to valve clearance would be.

i would use the .030

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P8R Head?

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