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Discussion Starter #1
hello, Im thinking to upgrade the pistons on my N20 engine to CP-pistons with lower CR(10:1)- mine is 11:1 , there's 2 options for bore size 84mm and 84.5mm .. i want to replace the pistons without taking the engine outside from the car .. so what do you think guys what bore size should i buy .. my car did 25,000KM if that matter

thanks all
 
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