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Walker 18321 Exhaust Muffler
| Brand | Walker 18321 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Body Width | 11 |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 26.625 |
| Body Height | 5.5 |
| Body Length | 16 |
| Body Material | Steel |
| Finish | Aluminized |
| Inlet 1 Type | 2 bolt welded flange |
| Inlet Configuration | Offset |
| Inlet Offset | 1.5 |
| Inlet Type | 2 bolt welded flange |
| Muffler Type | Combination |
| Outlet 1 Outside Diameter | 2 |
| Outlet 1 Type | Pipe connection |
| Outlet Configuration | Center |
| Outlet Outside Diameter | 2 |
| Outlet Type | Pipe connection |
| Product line | SoundFX Direct Fit |
| Fits | Nissan · 12 vehicles |
Direct-fit design. Installs as a specific replacement with no guesswork.
Aluminized steel. Helps resist corrosion for longer service life.
Mechanical interior joints. Spun-locked heads add durability and a quality finish.
Cross-references BRExhaust 283-275, Dorman - HELP 45181 and TYC 700279 for the same application. See all 3.
Walker SoundFX Direct Fit Muffler for Pathfinder
Walker SoundFX Direct Fit muffler Part Number 18321 is a specific-fit exhaust muffler for 1990-1995 Nissan Pathfinder applications. It combines 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.
Key Features
- Specific-fit exhaust muffler for 1990-1995 Nissan Pathfinder
- Oval muffler body with 11-inch body width, 5.5-inch body height, and 16-inch body length
- 100% aluminized steel construction for improved corrosion resistance versus low-carbon steel
- Mechanical interior joints and spun-locked heads for added durability
- Single inlet, single outlet layout with center outlet configuration
- 2-bolt welded flange inlet with offset inlet configuration
- 2-inch outlet diameter for pipe connection
Product Details
The Walker SoundFX Direct Fit line focuses on direct replacement exhaust components with factory-style fitment and controlled acoustics. This muffler is built for Nissan Pathfinder owners who need a replacement exhaust muffler that matches the original layout, including the offset inlet and center outlet arrangement. Part Number 18321 is also referenced in cross-application listings such as BRExhaust 283-275 and Dorman HELP 45181 for the same application.
Compatible With 1990-1995 Nissan Pathfinder, N/A. Use this muffler when replacing a worn, rusted, or noisy factory unit on Pathfinder models within the listed years. The direct-fit design supports straightforward alignment with the existing exhaust routing, and the aluminized steel body helps resist common exhaust-system corrosion.
Common Issues This Muffler Can Address
- Exhaust noise from a damaged or rusted muffler
- Corrosion-related failure in the muffler body or seams
- Poor exhaust sealing at the inlet flange area
- Factory muffler replacement needs on 1990-1995 Nissan Pathfinder models
- Fitment problems caused by mismatched inlet or outlet configuration
Installation Notes and Tips
Verify the inlet flange style, offset inlet location, and 2-inch outlet diameter before installation. If the welded assembly is damaged, replace all required exhaust parts to restore proper alignment and sealing. This muffler is not reversible and is not tunable, so installation should follow the vehicle’s original exhaust routing.
Quality Assurance
Walker builds the SoundFX Direct Fit line with aluminized steel, mechanical interior joints, and spun-locked heads to support durability in everyday exhaust service. Part Number 18321 is engineered as a direct replacement for the listed Nissan Pathfinder applications.
| Year | Make | Model | Drive Type | Liters | Cylinders | Notes |
|---|---|---|---|---|---|---|
| 1995 | Nissan | Pathfinder | 4WD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1995 | Nissan | Pathfinder | RWD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1994 | Nissan | Pathfinder | 4WD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1994 | Nissan | Pathfinder | RWD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1993 | Nissan | Pathfinder | RWD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1993 | Nissan | Pathfinder | 4WD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1992 | Nissan | Pathfinder | RWD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1992 | Nissan | Pathfinder | 4WD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1991 | Nissan | Pathfinder | RWD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1991 | Nissan | Pathfinder | 4WD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1990 | Nissan | Pathfinder | RWD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
| 1990 | Nissan | Pathfinder | 4WD | 3.0L | V6 | If welded assembly, replace all required parts; Optional Parts for Split System; SoundFX Direct Fit |
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