After reading a few threads I knew that the magnaflow was what I needed. I couldnt be more pleased! The truck has a great sound,increased the low end and improved throttle response. I used a siso off set 2.5" so it matched factory tubing. To me the sound is just a desired by product of improved performance. If this is what you want buy a muffler that is non chambered.


2004 supercab FX4
5.4 leaker!

 

Sounds sweet! Do you have pics? Did you do the install yourself?