I'll be getting to the dyno one of these days. I'll try and remember to do a pull with and without. But the way these pcv valves work they close off at higher rpms anyways so it really only effects lower range. But from a chemistry standpoint, you get a better combustion a higher octane rating and less knock.
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PW 07 HR350Z R.I.P. Totaled by 82yr old woman 
2010 40th Anniversary 370Z
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