I know a bunch of you guys are running the 6637 Mod, and I will be soon as well. I was wondering if any y'all ran the Afe Big Boost filter that Riff Raff offers as an option on the 6637 mod kit? Also is the standard filter in that kit a Donaldson or NAPA? I think I read somewhere the NAPA one is useless if it gets wet. Lastly have any of you guys fabbed a 'cold air' box for yours?

I have checked out some of the info in the Mod/tech stickie...great resource btw...

Just looking at the difference in filters and other options. Thanks a bunch as always.

 

Haha..@ myself...

Did some more reading on here and actually saw a post from Clay saying the Donaldson?Napa/etc are all the same filter, made by the same folks..amazing the stuff you can learn on this forum,,,

Myself I am leaning towards the AFE filter for my 6637 upgrade, gonna get it from Riff Raff...

Still curious if any of you have fabbed a 'cold air' enclosure though, something to keep it from sucking in just the hot air under the hood. (or does it matter)

Also I must be the one lucky OBS owner whose air intake box isn't cracked...mine works fairly well...or seems to anyway...

 

I just bought the afe big boost filter. I have not used it yet but it is good quality just looking at it. After two or three filters vs cleaning the afe then money is being saved vs cleaning. That was the bigger deal for me. I had been using my paper filter for three years and figured I needed a clean one anyway. Also the afe has a filter in the end.
I say go for it.

 

Well the only reason I would choose the 'standard' 6637 filter would be to go a little cheaper, I really like the afe better. From what I have read its a really good filter and it also lets considerably more air through.

Its a money thing I guess, I have some immediate mods I am wanting to do besides just the 6637...

What I consider must haves at the moment...

Eaton Truetruc
A good A/T tire (without breaking the bank)
6637 Mod
Downpipe upgrade
Kitty Delete
Coolant filter
Those are the must haves

The wants are

TS 6 chip
Injectors --cups at the same time--(why not)
International Up Pipes
Turbo rebuild with billet wheel

I am almost positive the list will grow as I learn/do more...

 

I just put the afe big boost on mine. Worth the extra pennies I think because of it longevity. All I know is my turbo just sings with the filter on now. Looks good under the hood too.

 

My s468 should like it real good

 

I'm running the Fleet Guard filter that is the same as a 6637.


I made a stainless steel holder for it because I didn't like it just laying on the inner fender. It is not quite a cold air box but does have a solid plate on the engine side other than the hole for the intake hose itself. It has a perforated front wall by the battery and open on top and back side. You can see it a little on the right side of this pic. There will be more pics of this set up when I'm done with it. It mounts the same as the original air box did.



Not sure how to make it a cold air box without punching a hole in the hood. Maybe put an air scoop on the one side of the hood. For now it has done just fine over the last year.
Running the bigger filter makes a world of difference.
I also had a perfectly good factory air box before this.

I also did a 3" downpipe and 4" cat delete exhaust on it at the same time. It is like having a different truck.
Out with the old..


This is the new....


I was very pleased with the way this exhaust fit. There is a thread from last June on here that I put my install pics on. It was an already started thread , by someone else dealing with exhaust. The only issue I had was the rear fuel tank strap has a bit of interference. It will get cut off this summer to get rid of the vibration from rubbing it. That is pointed out in that thread.

My list of things to do is alot like yours except the tires will be Michelins this go around. $1600 for tires is a chunk of change.
The other stuff might have to wait for a while. Got to get my Jeep ready for a trip to Colorado now. The F-350 is staying home this time. I hope..

 

IMO a cold air box has no noticeable effect on these engines.

 

Here is a link to that post with my install in it. Hope it helps give you some insight into what you want exhaust wise and what you are in for.
https://www.ford-trucks.com/forums/1322600-exhaust.html

I've run across post on here that the cold air box was not much needed as well. I could see it being useful if you did alot of stopped city idling or something without air flow past the truck.
Kind of why I only made mine solid on front just to keep anything flipped up from the fan or squirted out of something that shouldn't be squirting , from getting in the filter.

 

Thats some good info, was honestly a little worried bout the exhaust job, but looks like I can handle that no problem..Thanks..also really like the box