hi, new to the forum but im wondering what is the best intake performance. its a 2003 4.6L.

so far ive been very happy with the truck, even with all of the clunks and noises. oh well its a truck

 

im sure there will be different opinions, Airforce 1 here...

 

I have an AF1 too, and love it. In my opinion its the best looking under the hood, too.

 

I have a 2002 and I am waiting for UPS to deliver my Volant air intake

 

I went with the AEM Brute Force mainly because it uses a dry filter element, and because I have heard good things about it. Because it is a dry filter I don't have to worry about the oils which some filters use (ex. K&N) messing up my MAF sensor.
The Brute Force is a high quality product that I am very impressed and pleased with. The installation is very straightforward and took me about an hour.