Walker 55979 Exhaust Muffler Assembly
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Walker
 Quiet-Flow SS

Walker 55979 Exhaust Muffler Assembly

Brand Walker 55979
Outlet Outside Diameter 2.279
Grade Type Premium
Gasket Or Seal Included No
Inlet Type Pipe connection
Outlet Type 2 bolt welded flange
Inlet Inside Diameter 2.250
Body Height 5.500
Body Length 22.000
Body Width 11.000
Inlet Location Center
Inlet Quantity 1
Body Material Stainless steel
Outlet Quantity 1
Muffler Shape Oval
Overall Length 56.630
Outlet Location Offset
Shape Oval
Product line Quiet-Flow SS
Fits Lexus · 5 vehicles

Stainless steel construction. Helps resist corrosion and supports longer service life than aluminized mufflers.

Direct-fit replacement. OE-style design simplifies exhaust service and preserves factory-style fit.

Quiet-Flow SS line. Walker’s premium muffler series for domestic and foreign vehicle applications.

Cross-references 1742031650 for the same application. See all 1.

$125.64Free 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.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $125.64
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 Assembly options

Walker Quiet-Flow SS Muffler Assembly

The Walker 55979 is a direct-fit exhaust muffler assembly built for a precise OE-style replacement. It uses stainless steel construction and the Quiet-Flow SS design to deliver a longer service life than typical aluminized mufflers.

  • Stainless steel body for corrosion resistance and durability.
  • Direct-fit OE-style replacement for straightforward exhaust service.
  • Oval muffler shape with center inlet and offset outlet layout.
  • Pipe connection inlet and 2-bolt welded flange outlet for a secure exhaust interface.
  • Premium-grade construction from Walker Quiet-Flow SS.

Fitment and Application

Fits 2016-2020 Lexus RX450h, N/A. This exhaust muffler assembly is built for the Lexus RX450h application listed and matches the Quiet-Flow SS configuration for that vehicle. Part number 55979 is the reference to verify before ordering, and 55979 is also the key identifier for fitment lookup.

Common Exhaust Issues It Can Address

  • Rust or corrosion in the muffler body.
  • Exhaust noise caused by a worn internal muffler.
  • Fitment problems from a damaged or mismatched replacement muffler.
  • Leak points at the inlet or outlet connection.

Installation Notes

Confirm inlet and outlet dimensions, flange style, and overall length against the original part before installation. This assembly uses a pipe connection inlet and a 2-bolt welded flange outlet, so the exhaust connection points should be checked carefully during replacement. No gasket or seal is included.

Quality Assurance

Walker Quiet-Flow SS combines stainless-steel construction with an OE-style direct-fit design. The 55979 part number identifies this muffler assembly for the specified Lexus RX450h application.

Related reading

This part fits 5 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2020LexusRX450h3.5LV6Quiet-Flow SS
2019LexusRX450h3.5LV6Quiet-Flow SS
2018LexusRX450h3.5LV6Quiet-Flow SS
2017LexusRX450h3.5LV6Quiet-Flow SS
2016LexusRX450h3.5LV6Quiet-Flow SS
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
1742031650