2.5 WRX Heads

If cc is measured and matched and are equally port and polished and also for your own project valvetrain changed where is issue mix and matching castings?


Block casings maybe what your thinking of as need to be matching pair
 
i was advised by engine builder best not to mix and match heads and block,i see what you are saying about P+P ect but if some one wanted to use as is would be a gamble
 
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