i got a jdm b18c (non type r) with a fully built head, the head has already been milled almost 40 thousandths, what pistons can i use and still have enough clearence so i dont hit the combustion chamber....also with good tuning what compression can i get away with without having to use race gas

 

call JE and ask them, they will know. Make sure you kjnow the specs on the cams too. Make sure that whoever puts the motor together clys it to make sure you have valve clearance... Good luck

 

is this amir?

your probably gonna have to stick with those stock pistons if you want pumo gas...