Swapping muffler

Old 06-29-2018, 11:17 AM
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Swapping muffler

I have a Magnaflow 3” in 3” out single exhaust muffler on my 2003 F150 5.4L. Can I swap the muffler with one for a 5.4L F250? I noticed the F250 muffler is 3” in/out. I’d like to keep the existing 3” tailpipe from Magnaflow. I’m I being ridiculous or should I just put a stock walker replacement system for my truck that’s 2.5”. I need the truck to be quiet nowadays.
Old 06-29-2018, 02:46 PM
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You are going to have to take measurements to see if it will fit.
Old 06-30-2018, 08:00 AM
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I'm guessing you bought a Magnaflow cat back kit? As glc said some measuring will be required.
If they have the same IN and Out locations I would suspect that your only modification would be to the pipe from the engine to the muffler. Either making it shorter or longer to fit.
Old 07-15-2018, 02:40 PM
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Off sets and added/lessened pipe differences are your concern. Only way to find out is to see yourself. Any muffler can be universally fitted.
Old 07-15-2018, 02:49 PM
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Darren is right. You might need to fab it up to fit it. But there is lots of room underneath.

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