Quiet-Flow SS Muffler
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Walker Quiet-Flow SS Muffler

Part No. 21290 Warranty Details  
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Walker® is the only aftermarket exhaust manufacturer in North America with the capability to combine industry-leading coverage with a direct fit OE-style replacement, 100% structural stainless steel muffler, which provides over three times the average lifespan of competitors' aluminized replacement mufflers. Walker® Quiet-FlowSS is available for a vast majority of top-selling domestic and foreign-nameplate applications. In addition to Walker's renowned precision fit, superior flow, and OE-style sound, these mufflers feature 409 stainless steel heads, shell, bushings, louvered tubes and partitions. Walker® Quiet-FlowSS mufflers have a limited lifetime warranty and a 90-day Safe and Sound® guarantee. See www.walkerexhaust.com for warranty and guarantee details.

Product Features:
  • 100% structural stainless steel construction
  • 3X the life expectancy vs. typical aluminized mufflers
  • OE-style louvered tube technology lowers noise level for premium OE-style sound compared to straight perforated tubes
  • Precise OE-style routing & hanger positions for quick & easy installation
  • Comprehensive internal drainage system for corrosion resistance
  • OE-style domed heads help reduce radiated noise compared to flat heads
  • Spun-locked heads to help prevent rupture
  • Limited Lifetime Warranty and exclusive 90-Day Safe & Sound Guarantee
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Body Height:4 1/4 in
Body Length:18 in
Body Material:Stainless Steel
Body Width:9 3/4 in
Fitment:Direct OE Replacement
Grade Type:OEM Standard Part
Inlet Configuration:Centered
Inlet Connection Type:Pipe Connection
Inlet Inside Diameter:2.250 in
Inlet Quantity:1
Internal Construction:Combination
Muffler Inlet Diameter 1:2 1/4 in
Muffler Inlet Diameter Designation:Inside Diameter
Muffler Outlet Diameter Designation:Outside Diameter
Muffler Type:Combination
Outlet Configuration:Offset
Outlet Connection Type:Tip - Welded Spout
Outlet Diameter:2 in
Outlet Outside Diameter:2.000 in
Outlet Quantity:2
Outlet Type:Tip - Welded Spout
Overall Length:28 in
Shell Diameter Height:4.250 in
Shell Diameter Width:9.750 in
Shell Length:18.000 in
Shell Material:Stainless Steel
Shell Shape:Oval


by PowerReviews
WalkerQuiet-Flow SS Muffler

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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not the greatest


from brasher ny

About Me Automotive Technician


  • Easy To Install
  • Great Sound


  • Unattractive Design

Best Uses

  • Everyday Driving
  • Replacement

Comments about Walker Quiet-Flow SS Muffler:

This pipe was a good muffler in that it quieted the car down just like OEM. The problem is that it didnt last long at all and the hangers are not a good design and tend to completely fall off the car when I hit moderate bumps

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Do you have questions about this product?


Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

3 Questions | 3 Answers
Displaying questions 1-3
  • Q:

    Is the inlet pipe of the muffler stainless or aluminized?
    Asked on 12/3/2014 by dyno_dave

    1 answer



      Hi Dyno_dave, glad to assist you! The inlet pipe of this muffler is made of stainless steel.

      Answered on 12/3/2014 by Steve from AAP
  • Q:

    Is this really a stainless steel muffler ? Others list it as Aluminized.
    Asked on 4/8/2011 by Jack from NH

    1 answer



      The material and the finishing of the muffler are Stainless Steel and Aluminized.

      Answered on 4/9/2011 by Parts Guru Geo from AAP
  • Q:

    Part # 21290 What are the inlet size and overall length?
    Asked on 3/24/2011 by Paul from Amsterdam, NY

    1 answer



      The inlet diameter of the muffler is 2.250 in and the overall length of the muffler is 31.250 in.

      Answered on 3/25/2011 by Parts Guru Geo from AAP
Displaying questions 1-3

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