Just did Walker BTM & DIY 6637 - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 06-12-2010, 08:11 AM Thread Starter
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Thumbs up Just did Walker BTM & DIY 6637

And here are the part numbers/places I got the stuff

6637 Mod

4" dia, 3" long PVC Repair Coupling ($3.13 from McCoys)

Napa Gold Air Filter 6637 (58.49 from NAPA...next time Ill order two online as they were cheaper)

Koehler Enterprises Hose Clamps KE-64SS 2.5"-4.5" = ($4.32 from Autozone)


Thoughts - Gained some neat noises under the hood, couldn't really tell a difference in throttle response, will have to get back later after a few fillups to see if there was any at all mpg gain. I don't see where some people said the 6637 mod was "Too Loud", It seemed fairly quiet to me. Next is Foil Delete I think so I can try and get it a lil louder.

Walker Big Truck Muffler

Part Number 21470 from Napa [$77.99]

Thoughts - I like this mod for the money. Lots of gained throttle response...straight through style muffler instead of the junk factory one. Seems like getting up to speed I dont need to give it as much pedal to get to the speed limit off a light or passing. Only time will tell about the mpg as well. The muffler may be a teenie tiny bit louder then stock but not really noticeable. I think it is about perfect for someone wanting to get rid of the stock muffler but not wanting to sound like a drilling rig.


Overall I've been happy with the little amount of money I've spent on performance mods. Hopefully new guys (like myself) wondering what to do to their trucks...will take these experiences into consideration when deciding on making a DIY 6637 or swapping mufflers.

2004 Dark Shadow Grey Mustang GT - Stock
2000 F-250 XLT 4x4 - BTM, 6637, FPPF

2010: 21 days fishing | 23 days hunting



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post #2 of 11 Old 06-12-2010, 06:41 PM
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Those are nice mods. A good start to getting your truck how you want it. The foil delete is a nice touch. I went ahead and painted my intercooler pipe while it was off.

2012 F350 XLT CCLB 4x4 6.7


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post #3 of 11 Old 06-13-2010, 08:13 AM
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Walker BTM

I just installed my Walker BTM yesterday. I think it turned out pretty well. Has a nice tone to it, but then again I haven't driven the truck yet (just started it up in the driveway).

Just for future reference for others. Rockauto.com sells the Walker BTM for $46.79 plus shipping (mine ended up being like $55). Even better yet, Walker had a $40 rebate. So muffler will end up costing me about $15 in the end. Unfortunately for others the rebate ended May 31st. But RockAuto does have the best price I've found.

2002 F250 XLT CC 4x4
- Isspro EV gauges (Pyro, Trans temp, Boost)
- Walker BTM Muffler
- DIY Intake w/ AMSOIL 4095 washable/reusable filter
- 6.0 Liter Transmission Cooler
- '08 Kool-Vue tow mirrors
- Tuff Country 2.5" leveling kit 22962KN
- Factory F350 blocks in the rear
- Readylift 67-2094UB u-bolt kit for the rear
- Moto Metal 970 18x10's w/ -24 offset
- Cooper Discoverer S/T Maxx 295/70-18's
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post #4 of 11 Old 06-13-2010, 08:15 AM
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I love the drilling rig..she sounds preeeeetty happy when clankin around lol

05+ coils, 10 Rear diff, box, tailgate, lights, bumper, Full 07 front harley swap...the list is endless.

AS IM RARLEY on here anymore...have a question ?? EMAIL ME
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gladly answer any of your questions. OR search me on facebook. ill help out anyway I can !

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post #5 of 11 Old 06-13-2010, 04:02 PM Thread Starter
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If I ever sell my sports car I'll get a single cab 2wd for hotroddin / drillin riggin

2004 Dark Shadow Grey Mustang GT - Stock
2000 F-250 XLT 4x4 - BTM, 6637, FPPF

2010: 21 days fishing | 23 days hunting



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post #6 of 11 Old 06-13-2010, 05:50 PM
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Quote:
Originally Posted by BadGT04 View Post
And here are the part numbers/places I got the stuff

6637 Mod

4" dia, 3" long PVC Repair Coupling ($3.13 from McCoys)

Napa Gold Air Filter 6637 (58.49 from NAPA...next time Ill order two online as they were cheaper)

Koehler Enterprises Hose Clamps KE-64SS 2.5"-4.5" = ($4.32 from Autozone)


Thoughts - Gained some neat noises under the hood, couldn't really tell a difference in throttle response, will have to get back later after a few fillups to see if there was any at all mpg gain. I don't see where some people said the 6637 mod was "Too Loud", It seemed fairly quiet to me. Next is Foil Delete I think so I can try and get it a lil louder.

Walker Big Truck Muffler

Part Number 21470 from Napa [$77.99]

Thoughts - I like this mod for the money. Lots of gained throttle response...straight through style muffler instead of the junk factory one. Seems like getting up to speed I dont need to give it as much pedal to get to the speed limit off a light or passing. Only time will tell about the mpg as well. The muffler may be a teenie tiny bit louder then stock but not really noticeable. I think it is about perfect for someone wanting to get rid of the stock muffler but not wanting to sound like a drilling rig.


Overall I've been happy with the little amount of money I've spent on performance mods. Hopefully new guys (like myself) wondering what to do to their trucks...will take these experiences into consideration when deciding on making a DIY 6637 or swapping mufflers.

When you installed the BTM was it an exact fit or did you have to add a piece to the tail pipe? I was thinking about doing this mod but was wondering how much hacking a wacking I would have to do? I went to my local muffler shop the other day and the biggest they had was 3". So there is no place for me to get the adapters if I need them.

DIY Intake
Issopro egt,boost,trans.
4" summit exhaust.
PHP 6 position chip with 45 tow 65 tow 80 tow 65DD and 100Perf
Stancor mod.


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post #7 of 11 Old 06-13-2010, 06:23 PM
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so order a piece of 3.5"...its cheap..

05+ coils, 10 Rear diff, box, tailgate, lights, bumper, Full 07 front harley swap...the list is endless.

AS IM RARLEY on here anymore...have a question ?? EMAIL ME
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gladly answer any of your questions. OR search me on facebook. ill help out anyway I can !

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post #8 of 11 Old 06-14-2010, 07:21 AM
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I just cut mine out.....louder the better.

What this nation needs is cleaner thoughts and dirtier fingernails...

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post #9 of 11 Old 06-14-2010, 07:35 AM
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Quote:
Originally Posted by Duanesz View Post
When you installed the BTM was it an exact fit or did you have to add a piece to the tail pipe? I was thinking about doing this mod but was wondering how much hacking a wacking I would have to do? I went to my local muffler shop the other day and the biggest they had was 3". So there is no place for me to get the adapters if I need them.
You don't need any additional parts except for two clamps if you aren't going to weld them in. You will end up cutting about 6"-9" off the piece of straight pipe that connects to your S-pipe, and you will rotate your S-pipe 180 degrees for the proper rise. My neighbor who helped me fortunately has some welding experience. He did cut off one of the factory hangers from the stock system, and welded it on to the side of the new Walker muffler. It was a pretty easy swap. It is a bonus if you have a welder, but you can just as easy do it without and use clamps (I ended up using both - bought clamps as I didn't think I was going to have a welder).

2002 F250 XLT CC 4x4
- Isspro EV gauges (Pyro, Trans temp, Boost)
- Walker BTM Muffler
- DIY Intake w/ AMSOIL 4095 washable/reusable filter
- 6.0 Liter Transmission Cooler
- '08 Kool-Vue tow mirrors
- Tuff Country 2.5" leveling kit 22962KN
- Factory F350 blocks in the rear
- Readylift 67-2094UB u-bolt kit for the rear
- Moto Metal 970 18x10's w/ -24 offset
- Cooper Discoverer S/T Maxx 295/70-18's
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post #10 of 11 Old 06-14-2010, 04:58 PM Thread Starter
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I had a buddy weld it on!

2004 Dark Shadow Grey Mustang GT - Stock
2000 F-250 XLT 4x4 - BTM, 6637, FPPF

2010: 21 days fishing | 23 days hunting



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