Walker Quiet-Flow SS 21539 Direct Fit Exhaust Muffler 2.5" Inlet (ID) 2.5" Outlet (ID) for Ford F-150

4.6 4.6 out of 5 stars | 61 ratings

Price:

Last update: 01-25-2025


About this item

COMPATIBILITY – Fits 2004-2004 Ford F-150; 2005-2005 Ford F-150; 2006-2006 Ford F-150; 2007-2007 Ford F-150; 2008-2008 Ford F-150; 2006-2006 Lincoln Mark LT; 2007-2007 Lincoln Mark LT; 2008-2008 Lincoln Mark LT
GET THE RIGHT PART -- Before purchasing, research to ensure that the part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes
STAINLESS STEEL INHIBITS CORROSION -- The only broad-market muffler with 100% stainless-steel construction that delivers longer life versus aluminized mufflers while an internal drainage system reduces moisture collection
EASY TO INSTALL -- Direct-fit bolt-on replacement solution with OE-style hangers, brackets and pipe routings for easy installation and doesn't require specialized fabrication and/or welding
BUILT TO LAST -- Internal partitions and mechanically joined tubes allow expansion and contraction during temperature changes to minimize distortion while spun-locked heads and OE-style spot welds provide stability and longer service life
PREMIUM ACOUSTIC CONTROL -- OE-style louvered tubes lower noise levels while OE-style domed heads help reduce radiated noise for premium factory-style sound quality compared to straight perforated tubes
DESIGN VALIDATED -- Acoustic and flow tested for quality OE-style sound you can count on
BUY WITH CONFIDENCE -- Comes with Walker's limited lifetime warranty and exclusive 90-Day Safe and Sound Guarantee. Visit Walkerexhaust.com for details.

Product information

Technical Details


Top reviews from the United States

  • I'm Over Engineered
    5.0 out of 5 stars Quiet muffler and easy install!
    Reviewed in the United States on July 3, 2023
    True to description, this muffler is super quiet and the dimensions were exactly as described. I easily welded it to my pipes, both new and reused pipes. (Amateur/shade-tree welder here, don't judge my bead ha) Stainless build should last long too.

    Hope this is helpful and I would definitely buy this muffler again.
    Customer image
    I'm Over Engineered
    5.0 out of 5 stars Quiet muffler and easy install!
    Reviewed in the United States on July 3, 2023
    True to description, this muffler is super quiet and the dimensions were exactly as described. I easily welded it to my pipes, both new and reused pipes. (Amateur/shade-tree welder here, don't judge my bead ha) Stainless build should last long too.

    Hope this is helpful and I would definitely buy this muffler again.
    Images in this review
    Customer image
  • R.L.
    4.0 out of 5 stars Outlet in a different location, had to replace tailpipe also.
    Reviewed in the United States on December 6, 2023
    For the most part happy with the muffler. Only thing that cost them a star is that the outlet is in a different location than the original. Had to get a tail pipe from the local NAPA (part number 55424) to finish the job. NAPA had a muffler configured the exact same way as this replacement, believe this to be how walker makes them, great way for them to make a little extra on a tail pipe. I have a 08 F150 4.6l with a 144 W/B. Other than that, sounds great at a great price.
  • george shephard
    5.0 out of 5 stars Definition of quiet is here!
    Reviewed in the United States on January 19, 2025
    I didn't think an aftermarket product could be quieter than OEM, but I just learned about exhaust brands and composition. My truck is a 5.4 litre and this muffler is extremely quiet. Starts quiet, runs quiet. The product narrative is spot on.
  • Carlos P.
    5.0 out of 5 stars Worth the money.
    Reviewed in the United States on December 7, 2022
    Perfect fit and great results.
  • John Brazelton
    5.0 out of 5 stars Great product
    Reviewed in the United States on January 6, 2024
    Love the muffler made my truck super quiet
  • Stanley A. Helms
    3.0 out of 5 stars We'll see........
    Reviewed in the United States on October 4, 2019
    Not really sure the durability of this muffler.......at this point i am concerned. it is smaller/shorter than the OEM muffler, not as heavy duty. too early to tell at this point.
  • Kelley, J.
    4.0 out of 5 stars Walker Muffler
    Reviewed in the United States on February 22, 2024
    Well it changed colors from stainless steel to a nice blue-purple color.
  • mark
    5.0 out of 5 stars Good price too
    Reviewed in the United States on September 10, 2016
    I bought this muffler and a tail pipe here together . Shipped fast -- no damage and went right together --no issues . Good price too .

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