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Walker 18964 Exhaust Muffler
| Brand | Walker 18964 |
|---|---|
| Muffler Type | Reflection |
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 1.75 |
| Body Width | 11 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 30 |
| Body Height | 5.5 |
| Body Length | 18 |
| Body Material | Steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 1.75 |
| Inlet 1 Type | Pipe connection |
| Inlet 2 Inside Diameter | 1.75 |
| Inlet 2 Type | Pipe connection |
| Inlet Configuration | Dual |
| Inlet Offset | 1.5 |
| Inlet Quantity | 2 |
| Inlet Type | Pipe connection |
| Outlet 1 Type | 2 bolt welded flange |
| Outlet Configuration | Offset |
| Outlet Type | 2 bolt welded flange |
| Product line | SoundFX Direct Fit |
| Fits | INFINITI and Nissan · 9 vehicles |
Direct-fit design. Specific-fit muffler for easier installation and a cleaner replacement.
Aluminized steel. Helps resist corrosion for longer service life than low-carbon steel.
Reflection muffler. Engineered for quality appearance and favorable acoustics.
Cross-references AP Exhaust 7371 for the same application. See all 1.
Walker SoundFX Direct Fit Muffler for Pathfinder and QX4
Walker SoundFX Direct Fit muffler Part Number 18964 is a specific-fit exhaust muffler for select Nissan Pathfinder and INFINITI QX4 applications. It uses an oval steel body with an aluminized finish to support longer service life than low-carbon steel, while the reflection-style internal design helps deliver controlled exhaust acoustics.
Key Features
- Direct-fit exhaust muffler for specific vehicle applications
- Reflection muffler type for tuned exhaust sound control
- Oval body shape with aluminized steel construction
- Dual 1.75-inch pipe connection inlets
- Single offset outlet with 2-bolt welded flange
- Mechanical interior joints and spun-locked heads for added durability
- Walker SoundFX Direct Fit product line for OE-style replacement fitment
Product Details
Walker Part Number 18964 is built for 1996-2000 Nissan Pathfinder and 1997-2000 INFINITI QX4 vehicles. The muffler measures 30 inches overall, with an 18-inch body length, 11-inch body width, and 5.5-inch body height. Its dual inlet configuration and offset outlet layout match the listed applications, making it a practical replacement for worn or damaged factory mufflers on these Pathfinder and QX4 models. This part cross-references AP Exhaust 7371 for the same application.
Common Issues This Muffler Can Address
- Exhaust noise from a rusted or internally damaged muffler
- Reduced exhaust flow caused by corrosion or blockage
- Fitment problems when replacing a factory-style muffler assembly
- Visible deterioration of the exhaust canister or seams
- Unwanted exhaust tone changes on Nissan Pathfinder and INFINITI QX4 vehicles
Installation Notes and Tips
Compatible With 1996-2000 Nissan Pathfinder and 1997-2000 INFINITI QX4. If the original exhaust uses a welded assembly, replace all required parts during service to match the vehicle’s exhaust layout. Verify inlet and outlet configuration, flange style, and overall dimensions before installation. Part Number 18964 is not reversible and is not tunable, so orientation should be matched to the vehicle application during installation.
Quality Assurance
Walker SoundFX Direct Fit mufflers use 100% aluminized steel, mechanical interior joints, and spun-locked heads to support durability and consistent fit. The SoundFX Direct Fit line focuses on direct replacement applications with OE-style appearance and controlled acoustics for Nissan Pathfinder and INFINITI QX4 exhaust service.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2000 | INFINITI | QX4 | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2000 | Nissan | Pathfinder | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1999 | INFINITI | QX4 | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1999 | Nissan | Pathfinder | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1998 | INFINITI | QX4 | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1998 | Nissan | Pathfinder | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1997 | INFINITI | QX4 | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1997 | Nissan | Pathfinder | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1996 | Nissan | Pathfinder | 3.3L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
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