Help with finding info about 04 air intake system.
 

I'm not to big into cars, but I'm trying to learn more and more about it. I was just wondering about those panels in the air intake system somewhere in the 03-04 engines that open up at a higher RPM and create a votex allowing for a better gas air mix. Maybe I'm just an idiot but im pretty sure these exsist on some ford motors, I just dont know what they are called, or exatly where in the engine they are.