PiMpIn2.2CL

I was at the drive through at BK today and i noticed that my engine was making a weird clicking noise, then when i put the car in Nutral the noise stopped then in D4 and it started again?.. anyone know what this could be?..

Also when i get my body kit put on iwas thinking about getting my licence plate frame frenched (diagnle instead of straight across) any opinions?

Also last question. . is that new AEM CAI out?.. V2 i think its called?.. if so is it any better?..

Thanks guys!!