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Walker
Quiet-Flow SSWalker 21423 Exhaust Muffler
| Brand | Walker 21423 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 2.625 |
| Body Width | 9 |
| Inlet Quantity | 1 |
| Outlet Inside Diameter | 2.625 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 28 |
| Body Height | 7 |
| Body Length | 24 |
| Body Material | Stainless steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 2.625 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Center |
| Inlet Type | Pipe connection |
| Muffler Type | Combination |
| Outlet 1 Inside Diameter | 2.625 |
| Outlet 1 Type | Pipe connection |
| Outlet Configuration | Offset |
| Outlet Type | Pipe connection |
| Product line | Quiet-Flow SS |
| Fits | Cadillac, Chevrolet, and GMC · 51 vehicles |
100% stainless steel. Built for long-lasting corrosion resistance.
Precision fit. Installs cleanly with OE-style sound.
Superior flow. Helps exhaust move efficiently through the muffler.
Cross-references CSF 2306 for the same application. See all 1.
$113.11Free shipping
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Walker Quiet-Flow SS Muffler for GM SUVs
Walker Quiet-Flow SS muffler Part Number 21423 is a specific-fit exhaust muffler built for select Chevrolet, GMC, and Cadillac applications. It uses 100% stainless-steel body construction with an oval case, center inlet, and offset outlet for OE-style sound and steady exhaust flow.
The Quiet-Flow SS line focuses on precision fit and a factory-like sound profile for domestic and import vehicles. For drivers searching for a stainless steel muffler for 2000-2006 Chevrolet Tahoe, 2000-2006 GMC Yukon, or 2002-2005 Cadillac Escalade, this Walker 21423 replacement is built around those vehicle-specific requirements.
Key Features
- Specific-fit exhaust muffler for select GM full-size SUVs
- 100% stainless-steel body construction
- Oval muffler shape with a 28-inch overall length
- 2.625-inch center inlet and 2.625-inch offset outlet
- Combination muffler design for OE-style exhaust tone
- Walker Quiet-Flow SS product line for precision fit and controlled flow
- Part Number 21423 for catalog and fitment lookup
Detailed Description
Walker Quiet-Flow SS Part Number 21423 is an exhaust muffler engineered for direct replacement applications on select Chevrolet Avalanche 1500, Suburban 1500, Tahoe, GMC Yukon, GMC Yukon XL 1500, and Cadillac Escalade models. The stainless-steel body helps resist corrosion, while the oval case and pipe-connection inlet and outlet dimensions support a factory-style exhaust layout. This muffler is configured with a center inlet and offset outlet, matching the vehicle-specific routing used on the listed applications.
This part cross-references CSF 2306 for the same application. If you are replacing a worn or noisy muffler on a 2001-2006 Chevrolet Tahoe or a 2000-2006 GMC Yukon, Walker 21423 provides a direct-fit exhaust replacement option within the Quiet-Flow SS line.
What It Helps Address
- Exhaust noise from a rusted or internally damaged muffler
- Restricted exhaust flow caused by a deteriorated muffler core
- Fitment issues when replacing a vehicle-specific factory muffler
- Corrosion-related failure in the original exhaust housing
- Factory exhaust tone that has become louder or uneven
Installation Notes and Tips
Verify the inlet and outlet configuration before installation: this muffler uses a 2.625-inch center inlet and a 2.625-inch offset outlet. Confirm the vehicle application against the listed fitment, especially for 2000 Chevrolet Tahoe and 2000 GMC Yukon notes that indicate modifications and/or additional parts may be required on welded assemblies. For welded exhaust systems, replace all required parts as noted in the fitment data to maintain proper alignment and sealing.
- Fits 2002-2006 Chevrolet Avalanche 1500, N/A
- Fits 2000-2006 Chevrolet Suburban 1500, N/A
- Fits 2001-2006 Chevrolet Tahoe, N/A
- Fits 2001-2006 GMC Yukon, N/A
- Fits 2000-2006 GMC Yukon XL 1500, N/A
- Fits 2002-2005 Cadillac Escalade, N/A, except Luxury Package
- Fits 2000 Chevrolet Tahoe, N/A, except Luxury Package
- Fits 2000 GMC Yukon, N/A
Quality Assurance
Walker Quiet-Flow SS mufflers are built with stainless-steel construction and OE-style sound characteristics for vehicle-specific replacement use. The fitment notes list a limited lifetime warranty for the covered applications.
This part fits 51 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | Chevrolet | Tahoe | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | GMC | Yukon | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | GMC | Yukon | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2005 | Cadillac | Escalade | 5.3L | V8 | N/A | Except Luxury Package; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2005 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2005 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2005 | Chevrolet | Tahoe | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2005 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2005 | GMC | Yukon | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2005 | GMC | Yukon | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2005 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | Cadillac | Escalade | 5.3L | V8 | N/A | Except Luxury Package; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | Chevrolet | Tahoe | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | GMC | Yukon | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | GMC | Yukon | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | Cadillac | Escalade | 5.3L | V8 | N/A | Except Luxury Package; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | Chevrolet | Tahoe | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | GMC | Yukon | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | GMC | Yukon | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2002 | Cadillac | Escalade | 5.3L | V8 | N/A | Except Luxury Package; Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2002 | Chevrolet | Avalanche 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2002 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2002 | Chevrolet | Tahoe | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2002 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2002 | GMC | Yukon | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2002 | GMC | Yukon | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2002 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2001 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2001 | Chevrolet | Tahoe | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2001 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2001 | GMC | Yukon | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2001 | GMC | Yukon | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2001 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2000 | Chevrolet | Suburban 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2000 | Chevrolet | Tahoe | 4.8L | V8 | N/A | Except Luxury Package; Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, modifications and/or additional parts may be required.; Quiet-Flow SS |
| 2000 | Chevrolet | Tahoe | 5.3L | V8 | N/A | Except Luxury Package; Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, modifications and/or additional parts may be required.; Quiet-Flow SS |
| 2000 | GMC | Yukon | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, modifications and/or additional parts may be required.; Quiet-Flow SS |
| 2000 | GMC | Yukon | 4.8L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, modifications and/or additional parts may be required.; Quiet-Flow SS |
| 2000 | GMC | Yukon XL 1500 | 5.3L | V8 | N/A | Premium; Single Outlet Muffler Replaces Dual Outlet; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| No rows match your filter. | ||||||
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
CSF — 2306