So I have the stock Roush charged 5.4L 08' F-150....

Now I want to install headers, off-road cats ( or even no cats ) and an Intake...

Now can I just roll with the stock tune or will something mess up ?

 

a new tune will be mandatory with those new mods

 

Like he said... it's pretty much going to be required.

 

So wait, its already supercharged, what intake do you want to put on there? As long as it doesn't change the MAS/MAF you will be fine.

 

Doesn't the supercharger itself partially fool the stock MAF sensor? I doubt it was really designed to accurately recognize up to a 40% boost, was it?

- Jack

 

So you are Running the stock Roush tune "it BLOWS!" If you want long tubes you will want to get a new tune mine had to be richend after the pacesetters, you are going to want run some kinda cat, most guys use magnaflow high flows, as for the intake good luck I was told its a Beeioch to tune one on the Roush charged trucks the stock Roush one flows good.

 

So basically to get a little more power you guys recommend some long tube headers, hi flow cats ( can I just run no cats or will some senor be a problem for me ? ) keep the stock intake and a custom tune...

.....?

 

Im curious about the 04-08 5.4s with no cats will it cause problems or can ya tune it where it doesnt? (Question #2) and would you have to tune you truck if ya just put long tubes and high flow cats on it?