I just installed a Carriage Works billet grille and an AVS bug deflector. Now I'm noticing a whistling noise at about 65mph. It's pretty faint, but it's still annoying.

Wondering if anyone else has had this problem and if they were able to fix it. I'm not sure if the grille or the shield is the culprit. I'm actually thinking it might be the shield becuase I installed a Ford factory shield before the AVS and the noise was much louder. Suggestions???