Walker 21551 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 Quiet-Flow SS

Walker 21551 Exhaust Muffler

Brand Walker 21551
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Inlet Inside Diameter 3
Body Width 9
Outlet Inside Diameter 2.625
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 39.75
Body Height 7
Body Length 24
Body Material Stainless steel
Finish Aluminized
Inlet 1 Type 3 bolt welded flange
Inlet 2 Inside Diameter 3
Inlet 2 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 2.625
Inlet Quantity 2
Inlet Type 3 bolt welded flange
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 Chevrolet and GMC · 58 vehicles

100% stainless-steel construction. Resists corrosion for long-term exhaust durability.

Precision fit. Helps simplify installation with an OE-style replacement.

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

Cross-references CSF 2578 for the same application. See all 1.

$192.41Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $192.41
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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Walker Quiet-Flow SS Muffler for GM Vans

Walker Quiet-Flow SS muffler Part Number 21551 is a specific-fit exhaust muffler built for select Chevrolet Express and GMC Savana vans. It combines stainless-steel construction with an OE-style sound profile and a precision-fit layout for direct replacement service.

Key Features

  • Specific-fit exhaust muffler for select Chevrolet Express 2500/3500 and GMC Savana 2500/3500 applications
  • 100% stainless-steel body construction for corrosion resistance
  • Oval muffler body with a combination muffler design
  • 3-inch inlet with 2.625-inch outlet sizing
  • Offset inlet and outlet configuration for application-specific routing
  • Walker Quiet-Flow SS product line focuses on fit, flow, and OE-style sound
  • Part Number 21551 for catalog and service reference

Product Details

This Walker Quiet-Flow SS muffler is engineered for direct replacement on 2003-2010 Chevrolet Express 3500, 2003-2010 GMC Savana 3500, 2003-2009 Chevrolet Express 2500, and 2003-2009 GMC Savana 2500. The oval stainless-steel body measures 39.75 inches overall, with a 24-inch body length, 9-inch body width, and 7-inch body height. Its 3-bolt welded flange inlet and pipe-connection outlet layout support the factory-style exhaust routing used on these vans. The Quiet-Flow SS line is positioned for drivers who want a replacement muffler that maintains OE-style sound while preserving exhaust flow characteristics. Part Number 21551 is a practical choice when servicing the exhaust system on Chevrolet Express and GMC Savana platforms.

What This Muffler Helps Address

  • Rust or corrosion in the original muffler housing
  • Exhaust noise from a worn or damaged muffler
  • Restricted exhaust flow caused by internal deterioration
  • Fitment issues when replacing a factory-style muffler on GM full-size vans
  • Service needs on Chevrolet Express and GMC Savana exhaust systems

Installation Notes and Tips

Verify the inlet and outlet configuration before installation, since this muffler uses an offset layout with a 3-inch inlet and 2.625-inch outlet. For welded exhaust assemblies, replace all required related parts during service to maintain proper alignment and sealing. Confirm vehicle application by year, make, and model before ordering Part Number 21551.

Quality Assurance

Walker Quiet-Flow SS mufflers are built with stainless-steel construction and are part of a product line focused on precision fit and OE-style sound. This application listing includes a limited lifetime warranty note for the covered vehicles in the fitment data.

This part cross-references CSF 2578 for the same application.

Related reading

This part fits 58 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersWheel BasePositionNotes
2010ChevroletExpress 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010GMCSavana 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009ChevroletExpress 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009ChevroletExpress 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009ChevroletExpress 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009ChevroletExpress 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCSavana 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCSavana 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCSavana 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCSavana 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletExpress 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletExpress 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletExpress 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletExpress 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCSavana 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCSavana 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCSavana 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCSavana 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletExpress 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletExpress 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletExpress 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletExpress 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCSavana 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCSavana 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCSavana 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCSavana 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006ChevroletExpress 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006ChevroletExpress 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006ChevroletExpress 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006ChevroletExpress 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006GMCSavana 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006GMCSavana 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006GMCSavana 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006GMCSavana 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005ChevroletExpress 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005ChevroletExpress 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005ChevroletExpress 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005ChevroletExpress 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005GMCSavana 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005GMCSavana 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005GMCSavana 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005GMCSavana 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004ChevroletExpress 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004ChevroletExpress 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004ChevroletExpress 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004ChevroletExpress 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004GMCSavana 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004GMCSavana 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004GMCSavana 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004GMCSavana 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003ChevroletExpress 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003ChevroletExpress 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003ChevroletExpress 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003ChevroletExpress 35004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003GMCSavana 25004.8LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003GMCSavana 25006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003GMCSavana 35006.0LV8135.0"N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003GMCSavana 35004.8LV8135.0"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.
CSF — 2578