Just thought about it, i did clearances last week, at first i managed just 1 cylinder and gave up i ran out of daylight, and put everything back together i did drive it like that just 15-20 mins drove fine vtec everything ok but when idling not rough but you could here liitle tiny bit of fluctuation in exhaust tone obviously i had tighter clearances on cylinder 1 and the rest not acjusted yet, anyway when i got a chance i finished of clearances and its smooth etc i have to say im sure you can feel a slight loss in midrange but top end pulls hard, i was pondering this yesterday and was wondering if ecu should be rest? Also i swear my intake (stock) sounds louder . Sorry for long post