Ok, ive looked for hours for this and cannot find on here, internet, honda tech, so please dont say "oh, use the search". I am beginning to believe i bought a head under false pretenses. I bought a "fully rebuilt b18b head". What i received was definitely a rebuilt non-vtec head, all brand new OEM components, minus cams. But i dont think its a b18b head. I have searched everywhere for the head stamp and i CANNOT FIND IT ANYWHERE!! I have found PR4-0, PR4-1, PR4-2, and PR4-4. MY HEAD IS STAMPED PR4-3 and i cannot find that stamp anywhere on internet. Mad props for anyone who can give me info on this head (year most important)