Walker 18933 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 SoundFX Direct Fit

Walker 18933 Exhaust Muffler

Brand Walker 18933
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Inlet Inside Diameter 2
Body Width 9.75
Inlet Quantity 1
Reversible No
Tunable No
Overall Length 27.625
Body Height 4.25
Body Length 16
Body Material Steel
Finish Aluminized
Inlet 1 Inside Diameter 2
Inlet 1 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 2.875
Inlet Type Pipe connection
Muffler Type Combination
Outlet 1 Outside Diameter 2
Outlet 1 Type Tip
Outlet 2 Outside Diameter 2
Outlet Configuration Offset
Outlet Outside Diameter 2
Outlet Quantity 2
Outlet Type Tip
Product line SoundFX Direct Fit
Fits Nissan · 5 vehicles

Direct-fit design. Installs as a specific replacement with no modifications needed.

Aluminized steel. Helps resist corrosion for longer service life than low-carbon steel.

SoundFX tuning. Delivers quality appearance with favorable acoustics.

Cross-references AP Exhaust 700423 and BRExhaust 145-549 for the same application. See all 2.

$74.35Free 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 β€” free returns if it doesn't
Step 2 — Quantity
Order total $74.35
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 options

Walker SoundFX Direct Fit Muffler for Altima

Walker SoundFX Direct Fit muffler Part Number 18933 is a specific-fit exhaust muffler for 2002-2006 Nissan Altima applications. It is built with aluminized steel for improved service life versus low-carbon steel and is shaped to deliver a clean OE-style appearance with controlled exhaust acoustics.

Key Features

  • Direct-fit exhaust muffler for 2002-2006 Nissan Altima
  • Oval body shape with a combination muffler design
  • 100% aluminized steel construction and aluminized finish
  • Mechanical interior joints and spun-locked heads for added durability
  • Offset inlet configuration with dual offset outlets
  • 2-inch inlet and 2-inch outlet dimensions
  • Walker SoundFX Direct Fit line for OE-style replacement fitment

Product Details

Walker SoundFX Direct Fit Part Number 18933 is engineered as a specific replacement muffler for the Nissan Altima, covering 2002, 2003, 2004, 2005, and 2006 model years. The oval steel body measures 16 inches long, 9.75 inches wide, and 4.25 inches high, with an overall length of 27.625 inches. Its offset inlet and dual outlet layout support the factory-style exhaust routing used on these vehicles. This part cross-references AP Exhaust 700423 and BRExhaust 145-549 for the same application.

Common Issues It May Address

  • Excessive exhaust noise from a worn muffler
  • Rust or corrosion on the original muffler body
  • Damaged internal muffler components affecting sound control
  • Factory exhaust fitment problems caused by a failing replacement part
  • Loss of OE-style exhaust appearance on a Nissan Altima

Installation Notes and Tips

Compatible With 2002-2006 Nissan Altima, N/A. Verify inlet and outlet orientation, offset measurements, and overall length against the existing exhaust layout before installation. Because this is a direct-fit muffler, matching the factory pipe connection points is important for proper alignment and sealing. Professional exhaust installation is recommended when replacing a welded or heavily corroded muffler assembly.

Quality Assurance

Walker SoundFX mufflers use aluminized steel construction, mechanical interior joints, and spun-locked heads to support durability and consistent performance in everyday exhaust service.

Related reading

This part fits 5 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2006NissanAltima2.5LL4N/ASoundFX Direct Fit
2005NissanAltima2.5LL4N/ASoundFX Direct Fit
2004NissanAltima2.5LL4N/ASoundFX Direct Fit
2003NissanAltima2.5LL4N/ASoundFX Direct Fit
2002NissanAltima2.5LL4N/ASoundFX Direct Fit
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 700423BRExhaust — 145-549