BoostedMugen

I am about to install some order custom made forged pistons and rods for my D16. My question is, will it be totally necessary for me bore out the cylinders? Or could I get away with only some minor honing? I´ve read that forged pistons need more clearance due to expansion.......but, I didn´t want to remove the block from the car.

I plan on running 10 psi max. Will the OEM sleeves hold if bored a little bit? Or should I stick to OEM pistons? I will not exceed that pressure, just want to be on the safe side.