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5.4l muffler replacement

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Old Feb 21, 2010 | 04:16 PM
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5.4l muffler replacement

I'm looking to swap out the stock muffler on my '04 f250 to a flowmaster. I'm looking to do this without replacing any of the original exhaust piping. I'm currently looking at the flowmaster 40 series and the measurements are 20.5" x 10" x 4.5". I was just wondering if anyone else has done something like this and if the flowmaster will fit without any extra pipe or welding? Thanks in advance.
 
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Old Feb 21, 2010 | 05:21 PM
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You'll need extra pipe to make up the difference... the stock can if pretty long.

You'll also need a 3" ID to 3" ID coupler or band clamp to mate up the extension pipe.

Did it to my Dad's truck with a Flowmaster 40 and replaced that with a Magnaflow XL 3-chamber after the Flow rusted out. I don't recommend the Flowmaster, it only lasted 3 years on his truck.
 
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Old Feb 21, 2010 | 07:57 PM
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You'll need extra pipe to make up the difference... the stock can if pretty long.

You'll also need a 3" ID to 3" ID coupler or band clamp to mate up the extension pipe.

Did it to my Dad's truck with a Flowmaster 40 and replaced that with a Magnaflow XL 3-chamber after the Flow rusted out. I don't recommend the Flowmaster, it only lasted 3 years on his truck.
What he said...

I wouldn't recommend a Flowmaster either, compared to other mufflers out there I don't think they flow that great and they resonate in the cab something terrible. I like my Magnaflow, I have no cat, straight 3'' pipe with one of their round style mufflers. Its pretty damn loud now that I've blown the packing out, but it doesn't resonate too bad in the cab. Here's clip of what it sounds liken sled pullin':

Pulling Videos :: F250pull3rdplace.flv video by bradz71 - Photobucket
 
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Old Feb 21, 2010 | 10:03 PM
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On the 1999-2004 trucks, you'll also want to replace the restrictive factory Y-pipe.
 
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Old Feb 22, 2010 | 10:51 PM
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where /who makes a y pipe that does not have the restriction in it?
 
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Old Feb 23, 2010 | 02:04 AM
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A lot of 2V gas engine owners are using this one. (It fits the V-10 and the 5.4L)

00-04 Ford F250-F350 6.8L V10 Performance Y Pipe : eBay Motors (item 220557297423 end time Feb-25-10 15:35:36 PST)
 
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Old Feb 23, 2010 | 07:59 AM
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Originally Posted by redford
A lot of 2V gas engine owners are using this one. (It fits the V-10 and the 5.4L)

00-04 Ford F250-F350 6.8L V10 Performance Y Pipe : eBay Motors (item 220557297423 end time Feb-25-10 15:35:36 PST)
You can also buy that part from Mike at 5startuning instead of ebay. I ordered one yesterday for the Excursion.
JL
 
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Old Feb 23, 2010 | 09:05 AM
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How much was the one from Mike? Has it done any improvement for your excursion?
 
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Old Feb 23, 2010 | 09:10 AM
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Originally Posted by Jayman1
How much was the one from Mike? Has it done any improvement for your excursion?
It's still on the way-I ordered it yesterday.
JL
 
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Old Feb 23, 2010 | 09:13 AM
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Oh OK. Let me know how it works out. I may be interested in getting one.
 
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