What is available for these trucks. Any proven gains from certain CAI's. I was comparing part numbers for the 5.4 and the 4.6 and they are different.

Volant, K&N, pretty much all the big names make one. I'd go with the Volant or K&N, preference being the former.

PSP's Fast Air is another option. It one of the only true CAI kits out there.
Chicken Ears is developing a CAI kit that looks to be even superior to the Fast system. JL's is also a true CAI but uses less ducting to the air box.

Scott

I just recently put the K&N on my 2007 F150 Super crew and I love it. It made a big diference in all around town driving, but I cant really tell a gas mileage diference. The kit was very clean and detailed though, I love it.

i believe that the most popular one is the airforce one intake. there are slp,outlaw,k&n,roush,aem, and many others. i had a airraid and sold it. bought the airforce one and have been very happy with it. volant makes a nice one also.

i have a s&b and it provides a good allround diffrence but i really notice it on a hard launch.

i have a s&b and it provides a good allround diffrence but i really notice it on a hard launch.

S&B is wat Marco(yeyo) has on his and it sounds badass! and well his truck is running great for being a Ford.

ill say the afe magnum force stage 2 gives more then 30+ hp

in the above post i was running the 3.5 af1. it will need tuning for it to run correctly. i am now running the k&n intake and like it. and i can run my tunes or the stock tuning and it doesnt throw a cel.

What is available for these trucks. Any proven gains from certain CAI's. I was comparing part numbers for the 5.4 and the 4.6 and they are different.

you should build your own cai, i did and you can do it for about 1/4 or less of the price. my moms expedition had a tb spacer, it did sound cool, but as far as help, i really dont know. Do you have any other upgrades??

Anything with a closed box

s&b filters makes a good closed box intake for the fords.

and trying to make your own intake is kinda a pain due to the maf being in the location that it is in in the newer body styles. probably could do it with the older styles since it is near the air cleaner.