No it won't need mapping
But if you do fit an induction kit it is well worth resetting the ecu
And it will be dialled out before you get through a tank of petrol All breathing mods get dialled out on the Zed. The plenum charger is the only mod that gives a little extra gain. I should know, I had mine on the dyno on Satuday and it got 230WHP (278 @ the crank), and thats with pop charger, plenum spacer and Nismo exhaust. It should be noted that the torque curve put all the Evos I went up with to shame, and the noises was awesome