Do you have to....

im pretty sure you dont have to. but if you were combining a cai and a k&n filter it might be best to let the computer compensate for the extra flow of air.

 

lol i didnt worry about it

 

..... mate its a bit of plastic you dont have to do anything other than screw it in

 

any change in airflow, temperature or pretty much anything, and the ECU re-learns anyway. something minor like a CAI it pretty much re-learns by the time you get out your driveway