Milling Heads

From experience, Make sure you check the cc before milling so you know how much you have to work with. I took some j-heads in and told them to mill a certain amount not knowing they had been milled before and ended up with 49cc chambers. Also it's going to change the intake fit. You will need to have it milled to match the heads if you want it right. There is a formula floating around in here with the amount needed to take off the intake.