I have an 04 FX4 5.4 I have had a cam phaser lockout, new plugs, new coil pack, true dual exhaust, COI and a SCT programmer with custom tune. I want more power.....just rolled over 160,000 miles and as far as I can tell engine is good but,,,,,need more power.
I'm looking for solutions and suggestions. Thanks

 

You mention true duals, but do you have headers? high flow cats?

 

I do not have headers and the cats are factory.

 

Duals without headers dont do anything performance wise. Gears. Biggest bang for your buck.

 

How deep are your pockets?