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I found that a Walker 41987 exhaust connector is a good basis for connecting your 6637 filter to your intake. You'll have to cut it down, but it is readily available, enough to do two trucks (maybe three?), and about $21 from O'Reilly and also from Amazon.
3.96" O.D., 0.080" wall thickness, 8" long, and it's really heavy duty.
I've been using a 3" ABS connector, and I am switching over to this. Fun fact, doing this will increase the cross-sectional area of the inside of my intake pipe by 53.4%!! (Someone check my math)
Most of us that are running a 6637 filter have some sort of version of this. I acquired a 4" piece of metal tube from another FTE'r when purchasing some "no longer needed" parts from them. I believe they bought it from Pep Boys parts, but I am not 100% on that.
My coupler tube like yours is between the modified OEM tube and the 6637, you can see a small section of it colored silver. The black plastic from each part covers up most of the tube.
Most of us that are running a 6637 filter have some sort of version of this. I acquired a 4" piece of metal tube from another FTE'r when purchasing some "no longer needed" parts from them. I believe they bought it from Pep Boys parts, but I am not 100% on that.
I was going to visit the local muffler shops to beg for a scrap, but I thought that if I could attach an actual part number to something it could prove useful for others.
Originally Posted by Sous
My coupler tube like yours is between the modified OEM tube and the 6637
What is "modified" about your stock intake?
I read some threads yesterday about what function(s) the air intake temperature sensor may fulfill; I don't have a definitive answer. I am contemplating getting it off of the brake master cylinder and back into the airstream. Or maybe just tie-wrapping it to the outside screen on the filter.
And I know I have said this before, but, nice engine bay you've got there.
I was going to visit the local muffler shops to beg for a scrap, but I thought that if I could attach an actual part number to something it could prove useful for others.
Absolutely and agree 100%.
Originally Posted by KelVarnson
What is "modified" about your stock intake?
I have a T4 kit and turbo with the intake tube off the turbo. I painted it satin black, so it blends in quite a bit, which is what I wanted. I modified the OEM accordion style tube to fit over the end of the T4 intake. It then goes to the 6637 filter.
Originally Posted by KelVarnson
I read some threads yesterday about what function(s) the air intake temperature sensor may fulfill; I don't have a definitive answer. I am contemplating getting it off of the brake master cylinder and back into the airstream. Or maybe just tie-wrapping it to the outside screen on the filter.
And I know I have said this before, but, nice engine bay you've got there.
Thanks for the compliment.
The IAT sensor plays a bit of a role for input data for the PCM. I have mine under the fuse block on my 2000 or similarly placed as you do. I have found this is a good representation of true IAT for the PCM to utilize.
I had a piece of muffler shop scrap that was on there when I bought it, but it was sharp and wasn’t perfectly round, so I eventually just bought the curved one from Rfif-raff. Has a nice black crinkle coat on it and deleted the restriction gauge. (I don’t need to be reminded to change my air filter)
I acquired a 4" piece of metal tube from another FTE'r when purchasing some "no longer needed" parts from them. I believe they bought it from Pep Boys parts, but I am not 100% on that.
I saw that on Amazon yesterday for the same price, and almost pulled the trigger, but got spooked by a reviewer that said it was a little weak. He was trying to shorten it, though. My main concern was that I was considering putting a hole in it for the air intake sensor. Otherwise it sounded like it would work fine if you weren't trying to modify it.
Just for reference, I could stand on the Walker pipe and not bend it, if that is important to anyone.
I put the intake sensor in the rubber intake tubing. I did not modify the Spectre tube at all and it held up without issue. The worm clamp would break before the tube would if I gronked it too hard when putting on a new filter.
The tube lasted me 10+ years with no issue and continues to live on in Sous' truck.
: Spectre Polished Aluminum Straight Intake Tube, 4" | 9541083 | Pep Boys
