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Walker 18945 Exhaust Muffler
| Brand | Walker 18945 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 2.25 |
| Body Width | 11 |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 33.25 |
| Body Height | 5.5 |
| Body Length | 17 |
| Body Material | Steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 2.25 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 3.5 |
| Inlet Type | Pipe connection |
| Muffler Type | Combination |
| Outlet 1 Outside Diameter | 2 |
| Outlet 1 Type | Tip |
| Outlet Configuration | Center |
| Outlet Outside Diameter | 2 |
| Outlet Type | Tip |
| Product line | SoundFX Direct Fit |
| Fits | Buick and Pontiac · 18 vehicles |
Direct-fit design. Installs as a specific-fit exhaust muffler with no guesswork.
Aluminized steel. Helps resist corrosion for longer service life than low-carbon steel.
Mechanical interior joints. Spun-locked heads add durability for dependable performance.
Cross-references AP Exhaust 14731 and AP Exhaust 700373 for the same application. See all 2.
Walker SoundFX Direct Fit Muffler for GM Sedans
Walker SoundFX Direct Fit muffler Part Number 18945 is a specific-fit exhaust muffler built for select Buick and Pontiac applications. It uses 100% aluminized steel for improved service life versus low-carbon steel and is shaped to deliver a clean OE-style appearance with controlled exhaust sound.
Key Features
- Direct-fit exhaust muffler for specific applications
- Oval combination muffler design with one inlet and one outlet
- 100% aluminized steel body for corrosion resistance
- Mechanical interior joints and spun-locked heads for added durability
- Offset inlet configuration with center outlet layout
- 2.25 in. inlet inside diameter and 2.0 in. outlet outside diameter
- Walker SoundFX Direct Fit line focuses on OE-style fit and balanced acoustics
Product Details
This Walker muffler is engineered for vehicles that need a direct replacement exhaust component with factory-style fitment and measured sound control. The oval steel body measures 11 in. wide, 5.5 in. high, and 17 in. long, with an overall length of 33.25 in. The aluminized finish helps protect the steel construction, while the offset inlet and center outlet configuration support the listed applications. Part Number 18945 is cross-referenced with AP Exhaust 14731 and 700373 for the same application.
Compatible With 2001-2005 Buick LeSabre, N/A; 2000-2005 Buick Park Avenue, N/A; 2000-2005 Pontiac Bonneville, N/A; and 2000 Buick LeSabre, N/A with Federal Emission System. This part number 18945 is a practical choice when replacing a worn muffler on a Buick LeSabre, Buick Park Avenue, or Pontiac Bonneville and maintaining the original exhaust layout matters.
Common Problems This Part Can Address
- Excessive exhaust noise from a damaged muffler
- Rust-through or corrosion on the original muffler body
- Restricted exhaust flow caused by internal muffler deterioration
- Fitment issues when replacing a factory-style direct-fit muffler
- Loss of OE-style exhaust tone after muffler failure
Installation Notes and Tips
Verify the inlet and outlet configuration against the vehicle’s existing exhaust before installation. If the vehicle uses a welded assembly, replace all required related exhaust parts during service to maintain proper alignment and sealing. Confirm application details for the specific Buick LeSabre, Buick Park Avenue, or Pontiac Bonneville listed above before beginning installation.
Quality Assurance
Walker SoundFX Direct Fit mufflers are built with aluminized steel, mechanical interior joints, and spun-locked heads to support durability in everyday exhaust service. The SoundFX Direct Fit product line is positioned for direct replacement use with OE-style appearance and controlled acoustics.
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2005 | Buick | LeSabre | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2005 | Buick | Park Avenue | Base | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2005 | Pontiac | Bonneville | SE | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2004 | Buick | LeSabre | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2004 | Buick | Park Avenue | Base | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2004 | Pontiac | Bonneville | SE | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2003 | Buick | LeSabre | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2003 | Buick | Park Avenue | Base | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2003 | Pontiac | Bonneville | SE | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2002 | Buick | LeSabre | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2002 | Buick | Park Avenue | Base | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2002 | Pontiac | Bonneville | SE | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2001 | Buick | LeSabre | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2001 | Buick | Park Avenue | Base | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2001 | Pontiac | Bonneville | SE | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2000 | Buick | LeSabre | — | 3.8L | V6 | N/A | with Federal Emission System; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2000 | Buick | Park Avenue | Base | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 2000 | Pontiac | Bonneville | SE | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
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