Swapping muffler
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Junior Member
Joined: Oct 2007
Posts: 5
Likes: 0
From: South Jersey, NJ
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.
Senior Member
Joined: Apr 2016
Posts: 315
Likes: 0
From: Central Wisconsin
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.
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.
