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Walker 18900 Exhaust Muffler
| Brand | Walker 18900 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Body Width | 8.813 |
| Inlet Quantity | 1 |
| Outlet Inside Diameter | 2.25 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 33.25 |
| Body Height | 4.25 |
| Body Length | 28 |
| Body Material | Steel |
| Finish | Aluminized |
| Inlet 1 Type | 2 bolt welded flange |
| Inlet Configuration | Offset |
| Inlet Offset | 2.625 |
| Inlet Type | 2 bolt welded flange |
| Muffler Type | Combination |
| Outlet 1 Inside Diameter | 2.25 |
| Outlet 1 Type | Pipe connection |
| Outlet Configuration | Center |
| Outlet Type | Pipe connection |
| Product line | SoundFX Direct Fit |
| Fits | Oldsmobile and Pontiac · 13 vehicles |
Direct-fit design. Installs as a specific replacement with no modifications needed.
Aluminized steel. Helps extend service life versus low-carbon steel.
Mechanical interior joints. Spun-locked heads add durability for lasting performance.
Cross-references AP Exhaust 700341 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker SoundFX Direct Fit Muffler for GM Minivans
Walker SoundFX Direct Fit muffler Part Number 18900 is a specific-fit exhaust muffler built for select Pontiac Montana, Oldsmobile Silhouette, and Pontiac Trans Sport applications. It uses 100% aluminized steel for improved service life versus low-carbon steel and is shaped for a direct replacement on the listed vehicles.
The SoundFX Direct Fit line focuses on OE-style fitment, controlled acoustics, and a clean appearance. For shoppers searching for a Pontiac Montana muffler replacement, Oldsmobile Silhouette exhaust muffler, or Pontiac Trans Sport direct-fit muffler, Part Number 18900 provides a vehicle-specific solution.
Key Features
- Specific-fit exhaust muffler for select GM minivans
- Walker SoundFX Direct Fit product line
- 100% aluminized steel body and finish
- Oval muffler shape with combination muffler design
- 1 inlet and 1 outlet
- 2.25-inch inlet and 2.25-inch outlet inside diameter
- Offset inlet configuration with center outlet configuration
- 2-bolt welded flange inlet connection
- Overall length: 33.25 inches
- Body dimensions: 28 inches long, 8.813 inches wide, 4.25 inches high
Product Details
Walker 18900 is a direct-fit exhaust muffler engineered for 1997-1998 Pontiac Trans Sport, 1997-1999 Oldsmobile Silhouette, and 1999-2001 Pontiac Montana models. The aluminized steel construction helps resist corrosion better than low-carbon steel, while mechanical interior joints and spun-locked heads add durability to the muffler assembly. This part cross-references AP Exhaust 700341 for the same application.
Use this muffler when you need a replacement that matches the listed inlet and outlet configuration, body size, and connection style. The offset inlet and center outlet layout support the factory-style exhaust routing on the covered vehicles, making Part Number 18900 a practical choice for a Pontiac Montana exhaust muffler replacement or a direct-fit Oldsmobile Silhouette muffler service part.
What It Helps Fix
- Exhaust noise from a worn or rusted muffler
- Corrosion-related muffler failure
- Restricted exhaust flow caused by internal damage
- Fitment issues from using a universal muffler on a vehicle-specific system
- Factory exhaust replacement needs on the listed GM minivans
Installation Notes and Tips
- Compatible with specific-fit applications only; verify the vehicle year, make, and model before ordering.
- Fits 1999-2001 Pontiac Montana, N/A.
- Fits 1997-1999 Oldsmobile Silhouette, N/A.
- Fits 1997-1998 Pontiac Trans Sport, N/A.
- If the exhaust uses a welded assembly, replace all required parts during service.
- Confirm the 2.25-inch inlet and outlet sizing and the 2-bolt welded flange connection before installation.
Quality Assurance
Walker SoundFX Direct Fit mufflers are built with aluminized steel construction and internal joint design features intended to support long-term durability and a quality OE-style appearance. Part Number 18900 is part of Walker’s SoundFX Direct Fit line for vehicle-specific exhaust replacement.
| Year | Make | Model | Liters | Cylinders | Wheel Base | Notes |
|---|---|---|---|---|---|---|
| 2001 | Chevrolet | Venture | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2001 | Pontiac | Montana | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2000 | Chevrolet | Venture | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2000 | Pontiac | Montana | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1999 | Chevrolet | Venture | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1999 | Oldsmobile | Silhouette | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1999 | Pontiac | Montana | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1998 | Chevrolet | Venture | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1998 | Oldsmobile | Silhouette | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1998 | Pontiac | Trans Sport | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1997 | Chevrolet | Venture | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1997 | Oldsmobile | Silhouette | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1997 | Pontiac | Trans Sport | 3.4L | V6 | 112.0" | If welded assembly, replace all required parts; SoundFX Direct Fit |
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