ECU reset will do little as the zre ecus are not programmed to adjust the air fuel ratio with mods. if u do it, it will just go back to where it was before after a bit of a drive. blocking the flow will defeat the purpose of a cold air intake. i guess the reason why people do it is to get more power and to do this u need a larger flow of denser colder air. those who look into the mod of intake and exhaust will have to look at some gadget to adjust the air fuel ratio. to put more fuel inside so it doesnt become lean. pushing it around lean will risk a piston popping out. but in doing this, be prepared to fork out larger injectors and possibly a larger fuel pump so the stock ones don't crap themselves. dont forget the tuning as well. i think people should stop modding and think for a second whether they have the time to either live with the headaches or fork out for costly engine repair bills. when u mod, do it right and if a few extra bucks need to be put in, do so altogther rather than risk something expensive for just a bit of noise. my 2 cents