Need some advice/suggestions. I recently bought a brand new 2005 Lariat supercrew with the 5.4L 3V and can't decide what I should add.
According to K&N you can get 15 hp with the full air intake system they offer. Has anyone verified this and are they tweaking on the computer also?

Exhaust: anybody have any suggestions? I've been looking into Flowmaster but I've heard Borla will provide better performance. Of course the sound is just as important.

In addition does anyone know how you can verify whether or not adding intake and exhaust will void the warranty?

Thanks.

 

Do it all at once with a Magna Charger!

 

airforce one intakes seem to have the advantge right now if you ask me.k&n and airaid are also pretty good ones. as for the tuning yes they do. edge evelution and xcalibrator2 are the two best options available.