I own a 2004 F-150 FX4 with a 5.4. I not too impressed with the quickness of my truck. Does anyone know if there are any performance upgrades that will not void my warrantee?

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I’m also wondering if by putting an exhaust on, will that void my warrantee?

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Any help will do!

 

K&N makes a replacement air filter that will help a little or they have a cold air intake that is supposed to help even more.

 

The first mod I would make for performance is a Superchips 1714 programmer. They are used by me and many of us on this forum. It resets your computer with new more agressive settings and greatly improves performance. You will really think its a different truck. As for the warranty, you just program the computer back to stock before you go to the dealer and they will not even know you had the Superchips program installed.
As for exhaust, no it will not void your warranty!

Welcome to the forum, and good luck!

 

Hi halftonfunfx4, I second on a tuner.

Personal note, if you use office, the 'formating' puts those weird artifacts all over your post. Just click on edit your post and you can remove the junk. I like to type in office, then cut and past it into notepad, which then clears the formating junk, then cut and paste into the message box. Both methods work.
Have fun with your FX4;
Chris