I recently purchased a Gryphon CS for my 04 FX4 5.4L. I also purchased a few custom tunes based on recommendations from the forum and PHP. I currently have a Borla cat back and K&N CAI, but I think I want to install Troyer's transmission kit as well as their hotter coils and wires (when I do the dreaded spark plug change-out)
Did I just "waste" $90 on custom tunes, or will my truck be ok if I add these additional mods?
This money spending thing is pretty addictive...