I have an 2006 fx4 5.4 im intalling 2 super 44 ...will adding an x-pipe do any difference

 

Yes it will free up the exhaust flow and give you more hp and tq then a h pipe will.

 

So do you think the 2 super44 is a good set up or should i run a s/i , d/o,,,and do u do u recomend the x pipe

 

x or h pipe, you're not going to get any gains you can feel. With FI, focusing on the exhaust can be effective, but with NA it's really just about the exhaust note.

 

So just go with the 2 super 44 no x pipe

 

It's a waste of money IMO. You could put that money towards a lot of other things.

 

What's your reasoning for suggesting not having a crossover? Read this, a crossover is beneficial:https://www.f150forum.com/f11/exhaus...re-myth-78102/

 

I would assume the reason he suggested not using an x pipe is because that whole .5-.7 horse power he may gain isn't worth the cost of the x pipe..

 

Where's your dyno sheet for those numbers? Not saying your wrong just wondering where you pulled the numbers from. Usually more in the 2-5 hp range. Plus equalizing scavenging is really better in the long run on valves and engine.

 

I would be impressed if an x pipe could increase life on an already 5 year old engine.

And no, that was just a butt dyno in a fox body mustang and an older chevy truck.

It did sound better. But not worth the extra work and 50-100 bucks.