2 weeks ago, when I was replacing the timing belt on my aveo, since I was already in the area, i removed that box, also on my aveo since I dont have fog lights, I got my drill out and drilled some holes in the fog light cover, to help get cooler air into the intake. since then though, I have installed the full AEM cai. removing the resonator box and drilling holes in the fog light cover, the throttle response IMO was a little better