K&N the install is so damn easy it and it made the truck sound great!

 

I like my AEM Brute Force pretty well. I've had K&N in the past but I do a lot of driving in dusty/dirty conditions and it was a hassle to oil the filter. I really do prefer the oil-less filter in the AEM. Just my $.02

 

liking my af1 more and more each day. You'll have to ask me again after the first cleaning though.

 

I have the Volant CAI. The only complaint I have is that the install instructions suck!

 

Ditto Plus its got a nice throaty "suction" to it!

 

I just read this in another forum and thought it was quite interesting. Not sure if completely true though.

According to Kenny Belle's website, Headers cause a huge drop in low end torque on F150's and a very minimal gain in highend horse power. They also claim that cat back systems on F150s show no gains at all and that most aftermarket intake systems draw too much hot air into the engine and reduce horsepower and the amount of timing advance you can dial in with a tuner, they state that their supercharger warranty will be voided if any intake system is used that draws any air from under the hood. According to them the only effective power adders for 3V F150s are superchargers and tuners. they claim also that even when the engine is supercharged the factory exhaust system is already flowing more than the engine needs and any modifications in this area are a total waste of money.

 

i've heard similar stuff, more along the lines of the stock manifolds flow much better/more than headers