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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

Should a muffler rust out this quick?

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Old Mar 23, 2010 | 08:14 PM
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From: Coquitlam, BC
Default Should a muffler rust out this quick?

I havent had my truck for long. When I got it, I knew the muffler was pretty rusted, but I liked the sound. Probably from a very thin wall of metal because of all the rust haha. Either way, the truck has 70,000 km (43500 miles). I cant comprehend why a muffler would rot out that quickly.

Well today the tailpipe finally broke free from the muffler. She's much louder now. So I need an exhaust fix. I don't want to go all out. Might just put a different muffler on because all the other pipes aren't rusted out. I like SISO, no dual exhaust for me.

I need some advice for if these pipes should be replaced. Also, looking for a SISO muffler that has a tone that will let you know its not stock, but also not wake the neighbours when I start it in the morning. Thanks!



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Old Mar 23, 2010 | 08:16 PM
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screw the neighbors.... straight pipe it
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Old Mar 23, 2010 | 09:07 PM
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are you sure that is the stock exhaust?
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Old Mar 23, 2010 | 09:27 PM
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the muffler you have now looks like a flowmaster but i have the flowmaster 44 its a really aggressive deep sounding muffler
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Old Mar 23, 2010 | 09:35 PM
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i agree that is a flowmaster mufflerr, NOT factory, you can buy a stainless flowmaster muffler to replace it.
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Old Mar 23, 2010 | 10:58 PM
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Thanks everyone... I figured it was aftermarket because it sounded good. I didnt know if that was just leaking, or if it was a flowmaster.. i dont know what the stock muffler looks like.

The pipes look to have a lot of wall left despite the surface rust. Do you think I can get by with just replacing the muffler and leaving the pipes? The pipes definatly look better than the muffler
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Old Mar 24, 2010 | 12:10 AM
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Looks like you have plenty of meat on the end of the pipe to weld to, so I can't see why not... Head to the local muffler shop and have them weld one in...
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Old Mar 24, 2010 | 12:39 AM
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Get a stainless steel muffler. I have a Magnaflow exhaust. Sounds great.

The stock muffler looked like it was the size of an oil tanker compared to the aftermarket one.

Tim
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Old Mar 24, 2010 | 06:25 AM
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Pipes are fine. If you had the stock muffler, you'd know it; cut in half it makes an excellent farm troft for the animals. The stock muffler looks like it was designed to install on a semi.
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Old Mar 24, 2010 | 12:04 PM
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Thanks for everyones help. Found a brand new S.S. flowmaster muffler on craigslist for $40.

O.K. weird part--> flowmasters website says our trucks should have offset input, offset output. My truck has a center input and offset output. What's goign on here? Is this just because the previous owner had a muffler laying around that he used instead of using the proper one?
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