HomeExhaust > MufflersWalker 55494 Exhaust Muffler Assembly
Part #: 55494

Walker 55494 Exhaust Muffler Assembly

Quiet-Flow SS
23 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Quiet-Flow SS
Fitment: Lexus and Toyota, GX460, GX470, and 4Runner
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Quiet-Flow SS Exhaust Muffler Assembly 55494

The Walker Quiet-Flow SS Exhaust Muffler Assembly 55494 is designed for reliable exhaust performance on Lexus and Toyota vehicles, including the 4Runner, GX460, and GX470 models. This muffler assembly features durable stainless steel construction and an aluminized finish to resist corrosion and extend service life.

  • Compatible with Lexus 4Runner, GX460, GX470 and Toyota models
  • Stainless steel muffler and body for enhanced durability
  • Oval-shaped muffler body measuring 11" width by 5.5" height
  • Inlet and outlet with 2.5" and 2.37" outside diameters respectively
  • 2 bolt welded flange inlet and outlet for secure fitment
  • Offset inlet and outlet configuration for precise installation
  • Overall length of 52.25" with a 23" body length
  • Aluminized finish for corrosion resistance

Detailed Product Description

The Walker Quiet-Flow SS 55494 exhaust muffler assembly is engineered to provide effective noise reduction and exhaust flow management for select Lexus and Toyota SUVs. Constructed from stainless steel, both the muffler body and internal components offer resistance to rust and wear, making it suitable for regular grade applications. The oval-shaped muffler body measures 11 inches in width and height of 5.5 inches, with a length of 23 inches, fitting within an overall assembly length of 52.25 inches. The inlet and outlet feature 2 bolt welded flanges with outside diameters of 2.5 inches and 2.37 inches respectively, arranged in an offset configuration to match factory exhaust layouts. The aluminized finish further protects the muffler from environmental elements, ensuring longevity in daily driving conditions.

About the Quiet-Flow SS Product Line

The Quiet-Flow SS line by Walker focuses on combining stainless steel materials with advanced muffler designs to deliver consistent exhaust performance and durability. This product line emphasizes corrosion resistance and noise reduction, making it suitable for vehicles requiring reliable exhaust components that maintain factory sound levels. The 55494 muffler assembly exemplifies these qualities with its stainless steel construction and precise fitment for Lexus and Toyota SUVs.

Common Applications and Problem Solving

  • Replacement for worn or damaged mufflers on Lexus 4Runner, GX460, and GX470
  • Reduces excessive exhaust noise caused by muffler failure
  • Prevents exhaust leaks that can affect engine performance
  • Addresses corrosion and rust issues in older muffler assemblies
  • Restores proper exhaust flow for improved vehicle operation

Installation Notes and Tips

  • Ensure compatibility with vehicle make and model before installation
  • Use appropriate tools for 2 bolt welded flange connections
  • Inspect exhaust system for additional wear or damage during replacement
  • Verify offset inlet and outlet alignment for proper fit
  • Professional installation is recommended for optimal results

Quality Assurance and Warranty

Walker manufactures the Quiet-Flow SS 55494 muffler assembly to meet industry standards for durability and performance. The stainless steel construction and aluminized finish contribute to corrosion resistance and long service life. While specific warranty details are not provided, Walker products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.

BrandWalker
Part Number55494
PositionQuiet-Flow SS
Body Diameter11
Body Height5.5
Body Length23
Body MaterialStainless Steel
Body Width11
Friction Material ThicknessAluminized
Grade TypeRegular
Inlet 1 Outside Diameter2.5
Inlet 1 Type2 Bolt Welded Flange
Inlet ConfigurationOffset
Inlet Outside Diameter2.5
Inlet Type2 Bolt Welded Flange
Muffler MaterialStainless Steel
Muffler ShapeOval
Muffler TypeCombination
Outlet 1 Outside Diameter2.37
Outlet 1 Type2 Bolt Welded Flange
Outlet ConfigurationOffset
Outlet Type2 Bolt Welded Flange
Overall Length52.25
ShapeOval

This part fits 23 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2022LexusGX4604.6LV8N/AQuiet-Flow SS
2021LexusGX4604.6LV8N/AQuiet-Flow SS
2020LexusGX4604.6LV8N/AQuiet-Flow SS
2019LexusGX4604.6LV8N/AQuiet-Flow SS
2018LexusGX4604.6LV8N/AQuiet-Flow SS
2017LexusGX4604.6LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2016LexusGX4604.6LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2015LexusGX4604.6LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2014LexusGX4604.6LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2013LexusGX4604.6LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2012LexusGX4604.6LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2011LexusGX4604.6LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2010LexusGX4604.6LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2009LexusGX4704.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2009Toyota4Runner4.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2008LexusGX4704.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2008Toyota4Runner4.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2007LexusGX4704.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2007Toyota4Runner4.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2006LexusGX4704.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2006Toyota4Runner4.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2005LexusGX4704.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS
2005Toyota4Runner4.7LV8N/APremium; Limited Lifetime Warranty; Quiet-Flow SS

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

280-1257547

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.