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Walker 18981 Exhaust Muffler - Left
| Brand | Walker 18981 |
|---|---|
| Position | Left |
| Muffler Type | Reflection |
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 1.875 |
| Body Width | 10 |
| Inlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 29 |
| Body Height | 8 |
| Body Length | 14 |
| Body Material | Steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 1.875 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 2.625 |
| Inlet Type | Pipe connection |
| Outlet 1 Outside Diameter | 2.25 |
| Outlet 1 Type | Dual tips |
| Outlet 2 Outside Diameter | 2.25 |
| Outlet Configuration | Offset |
| Outlet Outside Diameter | 2.25 |
| Outlet Quantity | 2 |
| Outlet Type | Dual tips |
| Product line | SoundFX Direct Fit |
| Fits | Pontiac · 6 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.
Reflection muffler. Delivers quality appearance with favorable acoustics.
Cross-references AP Exhaust 700293 and AP Exhaust 700300 for the same application. See all 2.
Walker SoundFX Direct Fit Muffler for Grand Prix
Walker SoundFX Direct Fit muffler Part Number 18981 is a specific-fit exhaust muffler for the left side of select Pontiac Grand Prix models. It is built with aluminized steel and a reflection-style internal design to support a quality appearance and controlled exhaust acoustics.
Compatible with 2003-2008 Pontiac Grand Prix, left, this Walker SoundFX muffler is shaped as an oval unit with offset pipe connections and dual tips. The direct-fit layout helps match the original exhaust routing on vehicles equipped with dual exhaust.
Key Features
- Walker SoundFX Direct Fit line for application-specific exhaust replacement
- Part Number 18981
- Fits 2003-2008 Pontiac Grand Prix, left
- Oval muffler body with aluminized steel construction
- Reflection muffler type for tuned exhaust flow and sound control
- Offset inlet and offset dual-tip outlet configuration
- Mechanical interior joints and spun-locked heads for added durability
- 100% aluminized steel construction for longer service life than low-carbon steel
Product Details
Walker SoundFX Direct Fit is a product line focused on OE-style exhaust replacement with application-specific dimensions and fitment. For this Pontiac Grand Prix muffler, the design uses a 1.875-inch inlet, 2.25-inch dual outlets, and a 29-inch overall length to align with the vehicle’s exhaust layout. Part Number 18981 is a practical choice when replacing a worn or damaged rear muffler on a dual-exhaust Grand Prix.
This part cross-references AP Exhaust (e.g., 700293, 700300) for the same application.
Common Issues This Part Can Address
- Exhaust noise from a rusted or internally damaged muffler
- Corrosion-related failure in the original muffler body
- Poor exhaust tone caused by a deteriorated reflection chamber
- Fitment problems when replacing a left-side muffler on a dual-exhaust Grand Prix
- Visible exhaust system wear affecting the rear of the vehicle
Installation Notes and Tips
Verify left-side placement before installation and confirm the vehicle is equipped with dual exhaust. If the original system uses a welded assembly, replace all required related exhaust components to maintain proper alignment and sealing. Check inlet and outlet dimensions against the existing pipe connections before final installation.
Quality Assurance
Walker builds this muffler with aluminized steel, mechanical interior joints, and spun-locked heads to support durability and service life in everyday exhaust use. The SoundFX Direct Fit line is engineered for application-specific replacement on vehicles such as the Pontiac Grand Prix.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2008 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2007 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2006 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2005 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2004 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2003 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
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