OE Quality
60-Day Returns

Walker 18801 Exhaust Muffler - Left
Overview of Walker SoundFX Direct Fit Exhaust Muffler 18801
The Walker SoundFX Direct Fit Exhaust Muffler 18801 is designed specifically for Pontiac Grand Prix models, providing a precise fit and reliable exhaust performance. This oval-shaped muffler features a durable aluminized steel body that balances corrosion resistance with structural strength.
- Specific fit for Pontiac Grand Prix
- Oval body shape with 9-inch width and 7-inch height
- Aluminized steel construction for durability
- Inlet diameter: 1.875 inches; outlet diameter: 2.25 inches
- Offset inlet and outlet pipe connections for direct fit installation
- Overall length of 17.25 inches with a 14-inch body length
- Combination muffler type for balanced sound and performance
Detailed Product Description
The Walker SoundFX Direct Fit 18801 exhaust muffler is engineered to match the original equipment specifications for the Pontiac Grand Prix. Its oval shape and specific dimensions—9 inches wide, 7 inches high, and 14 inches in body length—ensure a seamless replacement without modification. The aluminized steel body offers resistance to rust and corrosion, extending the muffler's service life under typical driving conditions.
This muffler features a single inlet and outlet, both with pipe connection types and offset configurations (1.625 inches offset), facilitating straightforward installation in the exhaust system. The inlet inside diameter measures 1.875 inches, while the outlet inside diameter is 2.25 inches, supporting proper exhaust flow and noise reduction. As a combination muffler, it balances sound attenuation with exhaust efficiency, suitable for maintaining factory sound levels.
Walker SoundFX Direct Fit Product Line
The SoundFX Direct Fit line by Walker focuses on providing mufflers that are designed for specific vehicle applications, ensuring direct replacement without the need for additional modifications. This product line emphasizes precise fitment and sound quality, making it a practical choice for Pontiac Grand Prix owners seeking a reliable exhaust muffler replacement that aligns with original equipment standards.
Common Applications and Problem Solving
- Replacement for damaged or rusted mufflers on Pontiac Grand Prix
- Restores proper exhaust flow and reduces excessive noise
- Addresses exhaust leaks caused by worn or cracked mufflers
- Helps maintain emissions compliance by ensuring exhaust system integrity
- Improves overall vehicle performance by optimizing exhaust backpressure
Installation Notes and Tips
This Walker SoundFX Direct Fit muffler is designed for direct fit installation on Pontiac Grand Prix models, matching original inlet and outlet pipe sizes and offset configurations. Ensure the exhaust system is cool before installation and verify all connections are secure to prevent leaks. Professional installation is recommended for best results, especially when dealing with rusted or corroded exhaust components.
Quality Assurance and Warranty
Constructed from aluminized steel, the Walker 18801 muffler offers durability against corrosion and wear. While specific warranty details are not provided, Walker products typically meet industry standards for quality and reliability. For additional warranty information, consult the manufacturer or authorized distributor.
| Brand | Walker |
| Part Number | 18801 |
| Position | SoundFX Direct Fit, Left |
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 1.875 |
| Body Width | 9 |
| Inlet Quantity | 1 |
| Outlet Inside Diameter | 2.25 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 17.25 |
| Body Height | 7 |
| Body Length | 14 |
| Body Material | Steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 1.875 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 1.625 |
| Inlet Type | Pipe connection |
| Muffler Type | Combination |
| Outlet 1 Inside Diameter | 2.25 |
| Outlet 1 Type | Pipe connection |
| Outlet Configuration | Offset |
| Outlet Type | Pipe connection |
This part fits 6 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2002 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2001 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2000 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1999 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1998 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1997 | Pontiac | Grand Prix | 3.8L | V6 | Left | with Dual Exhaust; If welded assembly, replace all required parts; SoundFX Direct Fit |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.