Want to do a muffler delete...
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Posting Guru
Joined: Nov 2007
Posts: 1,426
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From: Manchester, NJ
Thanks DieselBeast, lot of help. Now i just called places looking for 4" pipe and they want like $65 for 10'. I obviously don't need that much. Am i better going to a muffle shop and seeing what they have, or getting the muffle delete pipe off of dieselmanor.com?
Posting Guru
Joined: Sep 2007
Posts: 1,715
Likes: 2
From: Seneca, SC
You will just have to shop around on that one. Like I said earlier, I had my stock exhaust straight piped at my local muffler shop for 25 bucks, About a year later I bought my current 5" aftermarket exhaust that already had the muffler delete pipe.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
Around here the local muffler shops can't bend 4" pipe. And the stock exhaust is 3 1/2" anyway. You may have a problem finding 3 1/2" pipe. I think if you have to use 3" pipe, it will still flow more then with the muffler on. 
You might go to a big truck shop and see what they have.
You might go to a big truck shop and see what they have.
Post Fiend
Joined: Feb 2007
Posts: 7,191
Likes: 4
From: Blairsville,Ga
Around here the local muffler shops can't bend 4" pipe. And the stock exhaust is 3 1/2" anyway. You may have a problem finding 3 1/2" pipe. I think if you have to use 3" pipe, it will still flow more then with the muffler on.
You might go to a big truck shop and see what they have.
You might go to a big truck shop and see what they have.
A lot of big truck part stores sell exhaust pipe by the foot and will cut what you need
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Thread Starter
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Posting Guru
Joined: Nov 2007
Posts: 1,426
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From: Manchester, NJ
Around here the local muffler shops can't bend 4" pipe. And the stock exhaust is 3 1/2" anyway. You may have a problem finding 3 1/2" pipe. I think if you have to use 3" pipe, it will still flow more then with the muffler on.
You might go to a big truck shop and see what they have.
You might go to a big truck shop and see what they have.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
OK, you do have 4" exhaust. Then all you need is a piece of straight pipe with the flared ends. Unless you get it wielded on.
Good luck.
Posting Guru
Joined: Jun 2008
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From: Albuquerque
I did mine shortly after getting this truck earlier last summer. It cost me $90 at a local shop here in Abq. I could have done it myself, but these guys weld for a living, I'm just able to join metel. Great job, and I love it, can't go by a wall or underpass without lowering that right rear window. Old lady just rolls her eyes.
NOTE: While your getting this done, ask for a 8 inch section of 4 inch pipe, that way you can do your 6637 filter and the ccv mod.
NOTE: While your getting this done, ask for a 8 inch section of 4 inch pipe, that way you can do your 6637 filter and the ccv mod.
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
You got to listen to this compliments of BDrummonds(Brandon). I might pull my muffler and straight pipe mine. Go to post #25 and click on the You-tube link. https://www.ford-trucks.com/forums/8...ool-duals.html
Senior User
Joined: Mar 2008
Posts: 157
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From: North Branford, CT
For what it's worth, NAPA sells a straight through muffler in 3.5" and 4" that fits in really well. Most of the benefit of a straight pipe without any drone while towing. The NAPA p/n for the 3.5" was 21470, similar to the Walker BTM muffler. This was my cheap fix for less back pressure and still being able to pass inspection (CT law requires a muffler).
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From: OAHU,KANEOHE HAWAII