I know this a dumb question to ask but im going to ask anyways. What is the piston size in a B18B? 81mm or 81.25? I plan on building a poor man's Type R and i'd like to switch out the pistons and rods with B18C5 internals. Id like to go mostlty motor this summer. What would be some good brands to go with?

 

http://en.wikipedia.org/wiki/Honda_B_engine#B18B1

81mm

 

Cool, appreciate man.

 

I would not buy piston untill you check your cynld walls to make sure it's not egg form shape if so. You have to increase the size of the piston and bore out your cynld walls

 

no problem