Walker 21577 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 Quiet-Flow SS

Walker 21577 Exhaust Muffler

Brand Walker 21577
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Inlet Inside Diameter 3
Body Width 9
Inlet Quantity 1
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 29
Body Height 7
Body Length 24
Body Material Stainless steel
Finish Aluminized
Inlet 1 Inside Diameter 3
Inlet 1 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 1.625
Inlet Type Pipe connection
Muffler Type Combination
Outlet 1 Outside Diameter 2.75
Outlet 1 Type Pipe connection
Outlet Configuration Offset
Outlet Outside Diameter 2.75
Outlet Type Pipe connection
Product line Quiet-Flow SS
Fits Chevrolet and GMC · 57 vehicles

100% stainless steel. Corrosion-resistant construction for long service life.

Precision fit. OE-style replacement with straightforward installation.

OE-style sound. Delivers a refined exhaust note without excess drone.

Cross-references 2539 for the same application. See all 1.

$113.14Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
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Step 2 — Quantity
Order total $113.14
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Exhaust Muffler options

Walker Quiet-Flow SS Muffler for OE-Style Exhaust Fit

Walker Quiet-Flow SS muffler Part Number 21577 is a specific-fit exhaust muffler built for direct replacement applications on select Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Avalanche, Chevrolet Suburban 1500, and GMC Yukon XL 1500 models. It combines stainless-steel construction with an OE-style sound profile and precision fitment for a clean exhaust repair.

Key Features

  • Specific-fit exhaust muffler for select domestic truck and SUV applications
  • 100% stainless-steel body construction for corrosion resistance
  • Oval muffler shape with a combination muffler design
  • 3-inch inlet with offset inlet configuration
  • 2.75-inch outlet with offset outlet configuration
  • Overall length: 29 inches; body length: 24 inches; body width: 9 inches; body height: 7 inches
  • Walker Quiet-Flow SS line focuses on OE-style sound and precise fitment

Product Details

Walker Quiet-Flow SS 21577 is engineered as a direct replacement muffler for exhaust service on 2007-2013 Chevrolet Silverado 1500 and GMC Sierra 1500, plus select 2007 Chevrolet Avalanche, Chevrolet Suburban 1500, and GMC Yukon XL 1500 applications. The stainless-steel body supports long-term durability, while the offset inlet and outlet layout helps match factory-style exhaust routing. This part cross-references part number 2539 for the same application.

The Quiet-Flow SS product line is Walker’s stainless-steel muffler family for drivers who want a replacement that follows OE-style sound characteristics and fitment. For shoppers searching for a Walker Quiet-Flow SS muffler 21577, this part is built around the dimensions and connection style needed for the listed truck and SUV platforms.

What It Helps Address

  • Rust or corrosion in the original muffler body
  • Exhaust noise caused by a damaged or leaking muffler
  • Poor fitment from a previous replacement part
  • Factory exhaust tone changes after muffler wear
  • Exhaust service needs on Silverado 1500, Sierra 1500, and related GM applications

Installation Notes

Verify inlet and outlet diameter, offset configuration, and overall length against the vehicle’s exhaust layout before installation. If the vehicle uses a welded exhaust assembly, replace all required related parts during service to maintain proper alignment and sealing. Confirm the specific year, make, and model match before ordering Walker 21577.

Quality Assurance

Walker Quiet-Flow SS mufflers are built with stainless-steel construction and are positioned as OE-style replacement components for broad domestic and import coverage. This part is listed with limited lifetime warranty coverage for the confirmed applications shown in the fitment data.

  • Fits 2007-2013 Chevrolet Silverado 1500, N/A
  • Fits 2007-2013 GMC Sierra 1500, N/A
  • Fits 2007-2008 Chevrolet Silverado 1500, N/A
  • Fits 2007-2008 GMC Sierra 1500, N/A
  • Fits 2007 Chevrolet Avalanche, N/A
  • Fits 2007 Chevrolet Suburban 1500, N/A
  • Fits 2007 GMC Yukon XL 1500, N/A

Related reading

This part fits 57 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersWheel BasePositionNotes
2013ChevroletSilverado 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2013ChevroletSilverado 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2013ChevroletSilverado 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2013GMCSierra 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2013GMCSierra 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2013GMCSierra 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2012ChevroletSilverado 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2012ChevroletSilverado 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2012ChevroletSilverado 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2012GMCSierra 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2012GMCSierra 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2012GMCSierra 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2011ChevroletSilverado 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2011ChevroletSilverado 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2011ChevroletSilverado 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2011GMCSierra 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2011GMCSierra 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2011GMCSierra 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010ChevroletSilverado 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010ChevroletSilverado 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010ChevroletSilverado 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010GMCSierra 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010GMCSierra 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010GMCSierra 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009ChevroletSilverado 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009ChevroletSilverado 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009ChevroletSilverado 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCSierra 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCSierra 1500—4.8LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCSierra 1500—4.3LV6—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletSilverado 1500LT4.8LV8143.5"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletSilverado 1500WT4.8LV8133.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletSilverado 1500WT4.8LV8143.5"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletSilverado 1500LT4.8LV8133.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletSilverado 1500—4.3LV6133.0"N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2008ChevroletSilverado 1500—6.0LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletSilverado 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCSierra 1500—4.8LV8143.5"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCSierra 1500—4.3LV6133.0"N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2008GMCSierra 1500—4.8LV8133.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCSierra 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCSierra 1500—6.0LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletAvalanche—6.0LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletSilverado 1500LT4.8LV8143.5"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletSilverado 1500WT4.8LV8133.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletSilverado 1500WT4.8LV8143.5"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletSilverado 1500WT4.3LV6133.0"N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2007ChevroletSilverado 1500LT4.8LV8133.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletSilverado 1500—6.0LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletSilverado 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletSuburban 1500—6.0LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCSierra 1500WT4.3LV6133.0"N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2007GMCSierra 1500—4.8LV8143.5"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCSierra 1500—4.8LV8133.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCSierra 1500—5.3LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCSierra 1500—6.0LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCYukon XL 1500—6.0LV8—N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
2539