I am currently trying to find out way the best brand is for my 99 f150 v6 4.2
Please help.
it is a 5 speed if that helps
thanks in advance

 

Unless you want it for looks, no make will have any advantage.
The stock system is already taking air from outside.
The cost is too high for no advantage.
Good luck.

 

The stock ford CAI is my far the best for these trucks.

 

Search for Gotts Mod. It opens up the intake nozzle a bit and costs very little to accomplish.

 

i have an airaid cold air intake on mine. got it as a gift and there was a small improvement in operation. good luck

 

There has never been dyno proven increases in HP or real world gas mileage improvement proof of any CAI. Waste of money.

 

Please go beyond simple thinking to some science of it.
The throttle body controls the amount of air entering the engine at any given RPM.
'Under' the wide open throttle position, the throttle plate angle is the controlling factor.
The filter and the piping are already oversized for the size of the motor.
The intake is already piped from the outside.
The only change in power now does come from a change in air temperature drawn from the outside which you have no control over.
Lastly you cannot feel less than a 10 hp increase such that a change in intake hardware will not come close to that amount of power change.
Also as the temperature changes the amount of fuel injected changes and ignition timing may even change.
This come about from the Mass Air sensor, the intake air temperature sensor, and Oxygen sensors.
The thing that drives these notions of power and mileage increases are the old carbed cars that have no controls but fixed jetting and poor intake air systems.
This all goes by the wayside in modern day computer control.
Good luck.

 

Go with the gotts mod. Took me less than two hours, and it was inexpensive maybe $10. It's almost the exact same as having a cai but $200 less!