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Walker

Walker Quiet-Flow SS 21904 Direct Fit Exhaust Muffler 2.75" Outlet (OD) for Subaru Forester

  • Based on 74 reviews
Condition: New
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$117.78 Why this price?
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Oct 16
Order within 8 hours and 2 minutes
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Features

  • COMPATIBILITY Fits 2014-2014 Subaru Forester; 2015-2015 Subaru Forester; 2016-2016 Subaru Forester; 2017-2017 Subaru Forester; 2018-2018 Subaru Forester
  • 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. Visitfor details.

Description

The only broad-market muffler with 100% stainless-steel construction, Walker® Quiet-Flow® SS mufflers feature precision fit, superior flow and OE-style sound. Quiet-Flow SS mufflers are available for most domestic and import vehicles.

Brand: Walker


Material: Stainless Steel


Item dimensions L x W x H: 28 x 8 x 22 inches


Vehicle Service Type: Car, Truck


Item Weight: 5.42 kg


Brand Name: Walker


Manufacturer Part Number: 21904


UPC: 086387219044


Manufacturer: Tenneco (Dynomax, Walker, Thrush)


Global Trade Identification Number: 44


Number of Items: 1


Included Components: Walker Muffler


Item Type Name: Walker Quiet-Flow SS Muffler


Model Number: 21904


Unit Count: 1 Count


Manufacturer Warranty Description: Contact retailer/seller for support


Item Dimensions: 28 x 8 x 22 inches


Item Weight: 5.42 kg


Inlet Connection Size: 3 inches


Compatible with Vehicle Type: Car, Truck


Automotive Fit Type: Vehicle Specific Fit


Material Type: Stainless Steel


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Oct 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Well worth the money!
This muffler was hundreds of dollars cheaper than going to a shop to have it replaced. Not knowing what to expect, I bought it and it was easy to install. It is almost as quiet as the factory muffler. It fit perfectly. No modifications were necessary, it bolted in place and the whole job took about a half hour. You don't need to be a mechanic to do this job. I'm very glad I bought this. Don't forget to buy the replacement gasket for the flange. ... show more
Reviewed in the United States on July 8, 2024 by Rich
    • Muffler installation was quick.
The insulation was very easy the hardest part was to get the old muffler off. Today is 8/21/26 and today is day two of driving and the new muffler so much quieter. Maybe if I remember I will give a review update in 6 months
Reviewed in the United States on August 21, 2026 by YUSUF BROWN
    • Don’t waste your money
Put it on in May, it’s August and rusted to dust and rattling. If I could get my money back I would. DON’T BUY THIS
Reviewed in the United States on August 22, 2025 by Kirk Knox
    • Perfect fit
The hardest part was getting the old damaged muffler out. After that it was perfect. Less bulky than the original Subaru muffler so it was easier to install with the existing hanger assemblies. More room to work!
Reviewed in the United States on May 31, 2024 by Christopher G.
    • Good Value - 4 Year Review - Walker Muffler 21904 for 2015 Subaru Forester Touring
Installed in 2020 on 2015 Forester. This muffler was ok to install aside from getting the old rusty parts cleaned out of the car. I have no lift but the muffler is relatively easy to get to on the 2015 Forester. It is a little louder than OEM but much cheaper. It is now August 2024 (156,000 miles on the car) and the muffler along with most of the other exhaust parts are rotted out. Considering the cost of Walker vs OEM, I would say that the life was acceptable. OEM lasted 5 years and Walker lasted 4 years. I'm in PA with loads of salt used on the roads in the winter which probably is the primary cause of the parts rotting out. ... show more
Reviewed in the United States on August 29, 2024 by Sarver
    • Big savings.
Fit great. Quiet. Saved tons of money doing it myself.
Reviewed in the United States on April 27, 2025 by Enginir
    • Great
After my stock muffler on my 2014 subaru i ordered this one.. and omg so so quiet its amazing
Reviewed in the United States on March 19, 2025 by Lauren Garen
    • Perfect fit..
This muffler is a perfect fit replacement. I like it. Walker can be counted on to make the right muffler as the advertise. Thanks for a $320.00 savings on the dealer estimate.
Reviewed in the United States on November 8, 2022 by one rusty rat

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