Walker 18984 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 SoundFX Direct Fit

Walker 18984 Exhaust Muffler

Brand Walker 18984
Muffler Type Reflection
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Inlet Inside Diameter 2
Body Width 11.5
Inlet Quantity 1
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 26.875
Body Height 6
Body Length 13
Body Material Steel
Finish Aluminized
Inlet 1 Inside Diameter 2
Inlet 1 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 3.5
Inlet Type Pipe connection
Outlet 1 Outside Diameter 2
Outlet 1 Type Tip
Outlet Configuration Center
Outlet Outside Diameter 2
Outlet Type Tip
Product line SoundFX Direct Fit
Fits Chevrolet · 11 vehicles

Direct-fit design. Installs as a specific-fit exhaust muffler with no guesswork.

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

Reflection muffler. Delivers favorable acoustics with a quality appearance.

Cross-references AP Exhaust 7454 for the same application. See all 1.

$85.04Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
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Step 2 — Quantity
Order total $85.04
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 SoundFX Direct Fit Muffler for Malibu

Walker SoundFX Direct Fit muffler Part Number 18984 is a specific-fit exhaust muffler for 2004-2007 Chevrolet Malibu applications. It uses an oval steel body with an aluminized finish to support longer service life than low-carbon steel designs, while maintaining a clean OE-style appearance and controlled exhaust acoustics.

Key Features

  • Direct-fit exhaust muffler for 2004-2007 Chevrolet Malibu
  • Reflection-style muffler design for tuned exhaust sound control
  • 100% aluminized steel construction for improved corrosion resistance
  • Oval body shape with 11.5-inch body width and 6-inch body height
  • Offset 2-inch inlet with center 2-inch outlet tip
  • Mechanical interior joints and spun-locked heads for added durability
  • Walker SoundFX Direct Fit line for OE-style fit and finish

Detailed Description

Walker 18984 is built for drivers replacing a worn exhaust muffler on a 2004-2007 Chevrolet Malibu. The specific-fit layout, 26.875-inch overall length, and pipe-connection inlet and outlet configuration support a straightforward exhaust service on the listed vehicle application. This muffler is part of the Walker SoundFX Direct Fit product line, which focuses on OE-style replacement fitment, durable construction, and controlled sound characteristics.

The aluminized steel body helps resist rust better than low-carbon steel, while the reflection muffler design is intended to manage exhaust tone without changing the vehicle’s basic exhaust routing. If your Malibu has a welded assembly, replace all required parts during service to restore proper exhaust function and alignment. This part cross-references AP Exhaust 7454 for the same application.

What It Helps Address

  • Exhaust noise from a damaged or rusted muffler
  • Corrosion-related muffler failure on a Chevrolet Malibu
  • Restricted exhaust flow caused by internal deterioration
  • Fitment issues when replacing an OE-style direct-fit muffler
  • Worn or leaking rear exhaust section components

Installation Notes and Tips

Fits 2004-2007 Chevrolet Malibu, N/A. Confirm inlet and outlet diameter, offset inlet placement, and center outlet configuration before installation. For welded exhaust assemblies, inspect the surrounding pipes and replace all required parts so the system aligns correctly and seals properly. Part Number 18984 is a specific-fit muffler, so matching the vehicle application is important before service begins.

Quality Assurance

Walker SoundFX mufflers are built with aluminized steel, mechanical interior joints, and spun-locked heads to support durability in everyday exhaust service. Part Number 18984 is engineered as a direct-fit replacement for the listed Malibu applications and follows the SoundFX Direct Fit product line’s OE-style construction approach.

Related reading

This part fits 11 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2007ChevroletMalibuMaxx LTZ3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2007ChevroletMalibuMaxx LS3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2007ChevroletMalibuMaxx LT3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2006ChevroletMalibuMaxx LTZ3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2006ChevroletMalibuMaxx LS3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2006ChevroletMalibuMaxx LT3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2005ChevroletMalibuMaxx LS3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2005ChevroletMalibuMaxx LT3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2004ChevroletMalibuMaxx LT3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2004ChevroletMalibuMaxx LS3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2004ChevroletMalibuMaxx3.5LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 7454