Walker downpipe #45166
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Joined: Jan 2005
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From: The Vieux Ford, Kansas
Walker downpipe #45166
I have an 89 bronco with a 300 and need to redo the exhaust it is completely rusted out. I would like to do it my self and have heard that the walker #45166 downpipe will get me one 2 1/2 pipe to work with is this true? It would be much easier and cheaper to buy this pipe instead of the one with the cat built into it. Has any one done this? Should I repost this on the exhaust fourm? I thought I would try here first because it is 300 specific information.
-Johnboy
-Johnboy
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Joined: Jul 2004
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From: Northern Virginia, USA
I thought the one with the cat in it is stainless steel. If it is, gut the small built-in cat and go from there. Otherwise, yes the Walker pipe will get you to 2.5". Make sure you clean up the cut & weld that Walker made where the rear pipe welds to the main pipe. You'll see what I mean when you get it. Easy enough to install, though.
Elder User
Joined: Sep 2003
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From: SE, Michigan
I have one on my 1982 F100 on my 300 that I rebuilt last summer. It worked just fine. Its not a performance part by any means though. I think I paid around $60 at my local parts store for it though. Here's a picture of it on my 300 while on the engine stand.
https://www.ford-trucks.com/user_gal...126942&width=0
vs the original factory pipes:
https://www.ford-trucks.com/user_gal...126941&width=0
https://www.ford-trucks.com/user_gal...126942&width=0
vs the original factory pipes:
https://www.ford-trucks.com/user_gal...126941&width=0
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Posting Guru
Joined: Jan 2005
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From: The Vieux Ford, Kansas
Thanks for the info I think I will go this route just because it is so simple not really looking for performace gains a little MPG would be nice but really it just needs replaced.
-johnboy
-johnboy
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Joined: Jan 2009
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Removal of cats
I currently have a magnaflow exhaust on my F-150 but want to remove all cats, what kind of set up should i use. Im troubled and really want those cats off!! Any suggestions??
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Elder User
Joined: Jul 2004
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From: Northern Virginia, USA
What year truck? Inline 6, right? FTE really doesn't advocate the removal/disabling of pollution control devices on street vehicles.
If you have EFI, the factory downpipe is really good. Cut off the old cats far enough ahead to maintain the 2.25" or 2.5" factory downpipe diameter, then weld in an inexpensive high-flow aftermarket converter (Example: CATCO from Summit Racing) of the appropriate size (make sure to pick one by the HP rating as well as the pipe diameter). Much better flow and emissions control than stock.
If you have a carb'ed truck, get a set of EFI manifolds and the Walker pipe mentioned in this thread, and install them. It's bolt-on simple, though you'll have to fabricate a hot-water plate for the bottom of the intake manifold to maintain drivability.
If you have EFI, the factory downpipe is really good. Cut off the old cats far enough ahead to maintain the 2.25" or 2.5" factory downpipe diameter, then weld in an inexpensive high-flow aftermarket converter (Example: CATCO from Summit Racing) of the appropriate size (make sure to pick one by the HP rating as well as the pipe diameter). Much better flow and emissions control than stock.
If you have a carb'ed truck, get a set of EFI manifolds and the Walker pipe mentioned in this thread, and install them. It's bolt-on simple, though you'll have to fabricate a hot-water plate for the bottom of the intake manifold to maintain drivability.
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Joined: Dec 2007
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From: Boise, Idaho
Seriously, put another cat on. I spend enough days with my throat swollen and my eyes burning because people want to get rid of emissions equipment.
As for the downpipe, it bolts up like a charm. I put EFI manifolds on my 81 and it worked great. 2.5" exhaust back to a cat, then a muffler, and then a 2.5" walker tailpipe and I put the whole setup on engine to the back myself. Pretty simple and flows absolutely awesome.
As for the downpipe, it bolts up like a charm. I put EFI manifolds on my 81 and it worked great. 2.5" exhaust back to a cat, then a muffler, and then a 2.5" walker tailpipe and I put the whole setup on engine to the back myself. Pretty simple and flows absolutely awesome.
Postmaster
Joined: Dec 2006
Posts: 3,603
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From: Spokane, WA
MagnaFlow has a Y pipe with their Cat that looks like it might be a better quality piece MagnaFlow 93302 - MagnaFlow Direct-Fit Catalytic Converters - summitracing.com But that sucker is spendy and I don't know if it can be had seperate from the Cat.
My Walker was not quite as bad as the one pictured above but still necessitated some grinding.
My Walker was not quite as bad as the one pictured above but still necessitated some grinding.
Moderator
Joined: Dec 2007
Posts: 7,987
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From: Boise, Idaho
Wish I had known about that extra junk in there before I installed mine. I'd just separate them and do it now, but the only place all the filings are going to go is through the cat and muffler.
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Joined: Feb 2006
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From: springfield
old thread but.... i just bought the walker 45166 pipe and picked up a bimetal 1.75 inch hole saw and drilled out the rear pipe. it was easy for me and took almost no time to do. just throwing out another way to clear out the extra material.