Walker 54654 Exhaust Muffler Assembly - Front
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Walker
 Quiet-Flow SS

Walker 54654 Exhaust Muffler Assembly - Front

Brand Walker 54654
Position Front
Body Diameter 11
Body Height 5.5
Body Length 27
Body Material Stainless Steel
Body Width 11
Friction Material Thickness Aluminized
Grade Type Regular
Inlet 1 Outside Diameter 2.75
Inlet 1 Type 2 Bolt Welded Flange
Inlet Configuration Center
Inlet Outside Diameter 2.75
Inlet Type 2 Bolt Welded Flange
Muffler Material Stainless Steel
Muffler Shape Oval
Muffler Type Combination
Outlet 1 Inside Diameter 2.5
Outlet 1 Type Pipe Connection
Outlet Configuration Offset
Outlet Type Pipe Connection
Overall Length 42
Shape Oval
Product line Quiet-Flow SS
Fits Chevrolet, GMC, and Buick · 15 vehicles

Direct-fit OE-style replacement. Installs like the original muffler assembly with no modifications needed.

Stainless steel construction. Helps deliver longer life than typical aluminized mufflers.

Oval combination design. Provides a practical muffler assembly with pipe connection outlet.

Cross-references AP Exhaust 18194, AP Exhaust 28692 and Gates 2405 for the same application. See all 3.

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Order total $150.84
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Free returns within 60 days if it doesn't fit when fitment is verified.
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Walker Quiet-Flow SS Muffler Assembly

Walker Quiet-Flow SS 54654 is a direct-fit exhaust muffler assembly built for OE-style replacement on select GM SUVs. It uses stainless steel for the muffler body and internal construction, with an oval housing and a center inlet, offset outlet layout for a factory-style exhaust connection.

Compatible with 2006-2009 Chevrolet Trailblazer front, 2006-2009 GMC Envoy front, and 2006-2007 Buick Rainier front, this muffler assembly is built for drivers replacing a worn or noisy front exhaust section. The Quiet-Flow SS line focuses on stainless-steel construction for longer service life than typical aluminized mufflers.

Key Features

  • Walker Quiet-Flow SS 54654 direct-fit muffler assembly
  • Stainless steel muffler material and body material
  • Oval muffler shape with 11-inch body diameter
  • Center inlet, offset outlet configuration
  • 2.75-inch inlet outside diameter with 2-bolt welded flange
  • 2.5-inch outlet inside diameter with pipe connection
  • 42-inch overall length for OE-style replacement
  • Aluminized finish

Product Details

Walker Quiet-Flow SS 54654 is an exhaust muffler assembly engineered as a direct replacement for the front exhaust position on select Chevrolet, GMC, and Buick applications. The stainless-steel construction helps resist corrosion better than standard aluminized mufflers, while the OE-style layout supports factory exhaust routing and fitment. This part cross-references AP Exhaust 18194 and Gates 2405 for the same application.

Fits 2006-2009 Chevrolet Trailblazer, front. Fits 2006-2009 GMC Envoy, front. Fits 2006-2007 Buick Rainier, front. Use this Walker muffler assembly when replacing a damaged, rusted, or excessively loud front muffler section on these vehicles.

What It Helps Address

  • Exhaust noise from a failing muffler
  • Rust or corrosion in the muffler body
  • Leaks at the inlet flange or outlet connection
  • Factory exhaust fitment issues after muffler replacement
  • Worn front exhaust section on GM SUV applications

Installation Notes

Verify inlet diameter, outlet connection type, and overall length before installation. This assembly uses a 2-bolt welded flange at the inlet and a pipe connection at the outlet, so the existing exhaust system must match the OE-style configuration. If the assembly is welded in place, replace all required adjoining parts during service to ensure proper alignment and sealing.

Quality Assurance

Walker Quiet-Flow SS muffler assemblies are built with stainless-steel construction and direct-fit OE-style dimensions for domestic and foreign vehicle applications. The Quiet-Flow SS product line is positioned for longer service life than typical aluminized mufflers.

Related reading

This part fits 15 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2009ChevroletTrailblazer—4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCEnvoySLT4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009GMCEnvoySLE4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletTrailblazer—4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCEnvoySLT4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008GMCEnvoySLE4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007BuickRainier—4.2LL6FrontPremium; without Air Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletTrailblazer—4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCEnvoySLT4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007GMCEnvoySLE4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006BuickRainier—4.2LL6FrontPremium; without Air Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006ChevroletTrailblazerLS4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006ChevroletTrailblazerLT4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006GMCEnvoySLT4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006GMCEnvoySLE4.2LL6FrontPremium; without Auto Air Leveling Suspension; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 18194AP Exhaust — 28692Gates — 2405