I just yanked it of mine today, and I would have to say it did make a positive difference. The engine doesn't choke up anymore when I stomp on the gas. A very cheap, and quick mod to do on our 4.6L.

 

Does anyone have the DWV intake mod for the 5.4? The link on page one does not work.

 

Just took mine out of my 05 4.6. I had never even thought about this mod until the post. Thanks a million to all who made this known to us all. I just took my truck for a drive, and I would say that I can actually feel a small difference. Not so much at WOT, but at low speeds the throttle response is really improved. Where my truck was extremely boggy and sluggish to respond at around 10-25mph, now it responds more quickly.

Less blockage = more airflow, which helps the system.

I would assume mileage would improve, contrary to what some have mentioned. I will let you all know.

By the way, my Edge is coming in this week!!!!

 

I'll be doing this mod in about 15 minutes after I finish my lunch.

 

Okay, more driving has been done since I removed my silencer last night (which I used a flathead and needlenose pliers to remove in about 20 minutes).

No doubt better throttle response, and very minimal change in noise.

I was a little skeptical at first, but I am totally convinced this is a safe and easy mod (did I mention FREE!) to do to a sluggish 4.6. Before, I was almost offended at how boggy my little 4.6er drove, but now the low end bog has basically disappreared. I do have a K&N drop in, so I am sure that it helps.

So essentially, you guys helped me create an intake for the cost of my K&N filter. This site is amazingly helpful.

 

1) So does anyone know why Ford has this in there in the first place?

2) Will this void a warranty if it's "caught" at a dealer?

I'm diggin' the concept since I don't care about showing off any parts under the hood... and this seems to be safe.

I am however still concerned about mpg... any "latest" mpg news from those of you who've done this?

Also, is the K&N drop-in necessary? Or will the good ol' Motorcraft paper be fine?

I'm cool on sound mods, but intake and the rest is new ground for me...

 

A k&N filter is a must for that mod, i have a dwv already made up that i took off my truck. E-mail me for info.

 

I have not measured my mileage as of yet, but after getting my Edge and taking out the silencer, it sure is seeming like my tank is taking forever to burn.

I'll let you know.

 

Well, I went ahead and did the "pull" of this seemingly unnecessary part... trying to decide between AirHog Fram, or a K&N drop-in...

I'll throw up some pics of the pulled piece next to the outer shroud on here as soon as I get a chance...

It took me less than 20 mins... a 7mm socket to loosen the piece on both ends, a screw driver to seperate the plastic in about four spots on the "inner" tube, and a long pair of stout needle nose pliers to do "the twist" and pull it out.

Sounds throatier (<---is that a word? ) already even before the drop-in...

This will be even better if I get the results everyone here has touted... it's still in my driveway right now... will test drive tonight!

 

btw-I went with the Fram AirHog... $5 less than K&N...

 

I think the reason that Ford put the silencer in there is due to the extra noise made by a straight through intake.

By the way, an update on mileage- I usually get about 15 in the city, and after having the silencer removed (remember, I have a k&n also) and a few miles with my Edge, I got 16 mpg driving like a total idiot. I have been testing 0-60 and 1/4 mile times, and going like 95. I would imagine I could squeak 17 out in the city and maybe like 20 on the highway.

Silencer removal + k&n + Edge level 2 + 89 Octane = WOW!

I would bet my little 4.6 could run against many 5.4s now.

 

do y'all not think that with the tube removed that there will be too much turbulance in that air box, causeing less fuel mileage. just a ? i had. thanks!!!

 

Great mod! Took me 20 minutes to remove. Seems like a little more mid and high end. I jumped on it getting on the expressway and the hesitiation is gone. I already had the K&N but this seemed to wake it up a bit. I didn't really notice any difference in sound but that may be due to the tires and magnaflow muffler.

Answer to ? ^^^^^ people put on throttle body spacers to get more swirl in the fuel\air mix so the turbulence is what probably helps in the power aspect. Just a guess.

 

Well, I couldn't resist. I just jerked that baby out about ten minutes ago. In a few minutes I will road test while on the way to Autozone to get a K&N or I may go with the airhog.

 

Damn, I may feel a little better thottle response, but it sure did add some growl to my SI/DO IMCO Elite series Muffler.