Swapping muffler

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06-29-2018, 11:17 AM

PFR03FX4

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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.

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06-29-2018, 02:46 PM

glc

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You are going to have to take measurements to see if it will fit.

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06-30-2018, 08:00 AM

1972-2003f150

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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.

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