Ok so the title sounds a bit n00b ish , however i know the basics on compression such as using higher comp pistons, flat faced valves , modify comp area etc. However what im unsure about is what pistons i can put into the b16a1 ( euro b16a ) to bump up the compression a couple of points. my stock engine (in theory) should be runing at approx 10.2:1 comp. I am going all motor and ive already selected my valves + cam. what im worried about is increasing compression by getting high comp pistons ( or i can skim the head right? ) .... and having valve to piston issues. where i live ( in the uk ) our gas at the pumps comes in 95 and 98 , so i may be able to run high comp with less issues than most usa gas .... but like i said im worried about piston to valve issues.... the cams have a hair over 12mm lift. any ideas? im aiming for comp around the 12:1 and above area. someone i know is selling itr pistons ( not sure if they are usdm or jdm yet ) for pretty cheap, however im guessing they will only give me just over 10.5:1 comp... So any ideas?