6637 mod... is this ok to do? - Ford Powerstroke Diesel Forum
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Old 12-28-2012, 02:04 PM
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6637 mod... is this ok to do?




Took the K&N off and put the stock hose on, 45 degree pvc pipe and put it all together. My question is, is it ok to run like this and does that air temp sensor need to be plugged up into the intake hose or is it ok if i were to zip tie that thing up near the filter?

Any suggestions let me know. The k&n that was on there had a stainless intake pipe i tried cutting it down and using it but just couldn't get it to work. Tried buying some hoses and other stuff at lowes but couldn't really find what I was looking for.
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Old 12-28-2012, 02:13 PM
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Looks fine to me... I've just tucked the temp sensor around the brake lines... not even sure if I used a zip tie or not!

I think the 6637 filter mod is the first thing any 7.3 owner that cares about their truck should do ASAP.
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Old 12-28-2012, 02:18 PM
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After I was done i took the truck up the street and definitely sounded like the truck was getting more air.
How often do you guys replace your filters?

Mod Costs:
Napa 6637 71$ (yaaa didn't have time to order one online)
45 Degree PVC: 4$
Used existing clamps...

Can't complain to much.
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Old 12-28-2012, 02:33 PM
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Looks good! I zip-tied the sensor nearby. Just make sure it is secured so as to not bump anything. Boy, that $71 is steep! You won't have to change that for awhile...no definite time-frame (too many variables from vehicle, location, driver, etc). Just keep an eye on it every now and then. I've got about 5k on mine. Still looks out of the box new.
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Old 12-28-2012, 02:36 PM
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Rog thanks guys!
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Old 12-28-2012, 02:49 PM
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I did the same thing but I ended up needing a straight piece of pvc...I check mine all the time and it still seems tight. Ive only put a couple hundred miles on mine so far though. I also had a K&N and went to the 6637 due to all the horror stories
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Old 12-28-2012, 02:55 PM
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Hey shanerbanner10, what kinda doo-dads are you running in your ride? I see a large positive off of the battery and a nest of wires next to the brake reservoir.
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Old 12-28-2012, 06:05 PM
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I Believe that is for the Amp Research steps (only has the drivers side installed right now, waiting on hardware to finish the other side). I will check tomorrow and see what that is.
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Old 12-28-2012, 06:31 PM
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That's a neat mod I have to boost the pregnant wife up with a step stool every single time. Makes folks heads turn wherever we go
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Old 12-28-2012, 08:34 PM
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haha ya man its definitely nice to have. The price on them is pretty crazy.
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