I have an 07 4wd f150 and i wanna dual it out truly but some people have told me i will run into back pressure issues since there is one side with alot more bends then the other would an x pipe or h pipe fix this or will this be an issue at all? I have afe cold air on it and edge evolution i dont think I have enough air coming out of my truck to keep up with the intake so any ideas id like to dual it but dont want to cause one side to run leaner than the other and cause engine problems


Also what are your opinions on throttle body spacers?
Thanks in advance
shane

 

throttle body spacers are useless.

true duals (2 mufflers) with an X pipe at max 2.5" piping will have no issues.

 

Any pics of a setup?
shane

 

Here's my X-pipe:



My mufflers:



And my tips:

 

Theres setups ALL over google.

 

If you're worried about running lean, you might want to take the CAI off your truck unless you have custom tunes to account for it on your Edge. Throttle body spacers are pretty much worthless. Stick with 2.5" pipes at max and you'll have no problems. Most people on here recommend an X-pipe over an H. Check out THE Exhaust Guide for all the information you'll need.

 

what they said^

 

x2 on what he said.

 

So your sayin run my stock intake or?...i thought CAI helped not damaged?
Guys please excuse my ignorance on this subject I dont know as much as I wished. Is my CAI bad? Is there a way to custom tune it with my Edge Evoloution?
Thanks in advance
Shane

 

edge doesnt offer custom tunes...gryphon does

 

How much does a Gryphon cost? what all can it do?

 

The 04-08 3v engines run slightly lean from the factory. Adding the CAI changes the ATF (air to fuel ratio) and will cause it to run more lean. Running lean for an extended amount of time can cause damage to your engine. If it was me, I would not run a CAI unless I had a custom tune to account for it. Having a custom tune will adjust the ATF and cause the engine to run at an optimal ratio. You can upgrade your Edge to a Gryphon and get custom tunes from a company called Power Hungry Performance. The form you need to fill out to have your Edge upgraded can be found here.

Check out the 2 links that I posted above and it should give you all the information you need. Be forewarned that it will take some time for your Edge to get upgraded and custom tunes written. They are a small company and they get a LOT of business. However, they are good at what they do. Just know you will have a wait. How long, I don't know. It varies from person to person and the current workload.

Also, check out the PHP forum for all the information you could want for Gryphons.

 

People that give exhaust advice that truely have no clue how exhausts run/act and use the term 'backpressure' turn me into the model of "Migraine Headache".

 

or your "over exaggerating"


i use 2.5" because theres no loss of backpressure

 

I also have 2.5" and noticed a VELOCITY and static pressure loss of low end power when towing a 6,000lb trailer. Runs fine unloaded, loves WOT, but stock manifolds. My backpressure rumble on a downhill decel is cool though I do like that, but the trans doesn't so much.