Well me and cedric at modern prefornace are about to do a sick ass port and polish to this b16 head i have and my question is what is the best size valves? i know they make stainless .5mm and 1mm over size but how does the +1mm sit in the vavle seat? It looks like it will be ok but i want to make sure before buying valves and all that shit.I also am wondering if anyone had clearence issues with the valves in the combustion chambers.I know we can work it out no matter what but i would like to know what i am getting into before starting it all.. I am not going turbo or anything but i will have one of the sickest all motor sprayed b series around by next year so be on the look out..I am looking to go all motor FORGED/sleeved b18c with S2 stage 2 cams or maybe even some jun's. I am just trying to get some input...any info helps..Please do not reply unless you know what you are talking about..thanks guys..