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Walker 21398 Exhaust Resonator
| Brand | Walker 21398 |
|---|---|
| Body 1 Height | 4 |
| Body 1 Length | 26 |
| Body 1 Shape | Round |
| Body 1 Width | 4 |
| Body Height | 4 |
| Body Length | 26 |
| Body Material | Steel |
| Body Width | 4 |
| Friction Material Thickness | Aluminized |
| Inlet Configuration | Center |
| Inlet Quantity | 1 |
| Inlet Type | 2 Bolt Welded Flange |
| Outlet Configuration | Center |
| Outlet Inside Diameter | 2.25 |
| Outlet Outside Diameter | 2.25 |
| Outlet Quantity | 1 |
| Outlet Type | Pipe Connection |
| Resonator Shape | Round |
| Universal Or Specific Fit | Direct Fit |
| Fits | Buick, Pontiac, and Chevrolet · 36 vehicles |
Direct fit. Installs as a direct replacement with no modifications needed.
OE-style sound. Precise tuning helps deliver the original system's tone and flow.
Steel construction. Aluminized finish adds corrosion resistance for lasting performance.
Cross-references Anchor 2501 and Anchor 2601 for the same application. See all 2.
Walker 21398 Exhaust Resonator Overview
Walker 21398 is a direct-fit exhaust resonator built for OE-style sound control and steady exhaust flow. It is designed for select Buick, Chevrolet, and Pontiac applications, including the Chevrolet Impala, Chevrolet Monte Carlo, Buick Allure, Buick LaCrosse, and Pontiac Grand Prix.
With a round steel body, aluminized finish, and center inlet/outlet layout, this Walker resonator is built to match the original exhaust configuration on supported vehicles. The 2-bolt welded flange inlet and 2.25-inch pipe connection outlet support a factory-style replacement on vehicles that use this layout.
Key Features
- Direct fit exhaust resonator for OE-style replacement
- Round steel body with aluminized finish for corrosion resistance
- 2.25-inch inlet and 2.25-inch outlet sizing
- Center inlet and center outlet configuration
- 2-bolt welded flange inlet with pipe connection outlet
- Designed for controlled exhaust tone and smooth flow characteristics
- Walker part number 21398
Detailed Product Description
Walker 21398 is engineered to fit, perform, and sound like the original exhaust system on supported vehicles. The resonator uses precise tuning to help maintain OE-style exhaust note while preserving flow characteristics needed for factory replacement service. Its aluminized steel construction and round body design make it a practical choice for restoring the exhaust path on vehicles such as the 2000-2005 Chevrolet Impala, 2000-2005 Chevrolet Monte Carlo, 2005-2009 Buick Allure, 2005-2009 Buick LaCrosse, and 2005-2008 Pontiac Grand Prix with single exhaust. This part number 21398 is a direct-fit solution for applications that use a center inlet and center outlet resonator layout.
This part cross-references Anchor (e.g., 2501, 2601) for the same application.
Common Repair Uses
- Restoring factory exhaust tone after resonator wear or damage
- Replacing a rusted or corroded resonator section
- Correcting exhaust noise from a failing center-mounted resonator
- Returning exhaust flow to an OE-style configuration
- Repairing a vehicle with a welded exhaust assembly that requires resonator replacement
Installation Notes and Tips
Compatible With 2005-2009 Buick Allure, N/A; 2005-2009 Buick LaCrosse, N/A; 2005-2008 Pontiac Grand Prix, N/A with Single Exhaust; 2000-2005 Chevrolet Impala, N/A; and 2000-2005 Chevrolet Monte Carlo, N/A. For welded assemblies, replace all required parts to complete the repair correctly. Verify inlet and outlet diameter, flange style, and center configuration before installation. Walker 21398 should be matched to the vehicle’s original exhaust layout for proper fitment.
Quality Assurance
Walker designs this resonator with OE-style fit, flow, and sound characteristics in mind. The aluminized steel body and factory-style configuration support a service replacement that follows the original system layout on confirmed applications.
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2009 | Buick | Allure | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2009 | Buick | LaCrosse | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2008 | Buick | Allure | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2008 | Buick | LaCrosse | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2008 | Pontiac | Grand Prix | — | 3.8L | V6 | N/A | with Single Exhaust; If welded assembly, replace all required parts |
| 2007 | Buick | Allure | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2007 | Buick | LaCrosse | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2007 | Pontiac | Grand Prix | — | 3.8L | V6 | N/A | with Single Exhaust; If welded assembly, replace all required parts |
| 2006 | Buick | Allure | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2006 | Buick | LaCrosse | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2006 | Pontiac | Grand Prix | — | 3.8L | V6 | N/A | with Single Exhaust; If welded assembly, replace all required parts |
| 2005 | Buick | Allure | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2005 | Buick | LaCrosse | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2005 | Chevrolet | Impala | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2005 | Chevrolet | Impala | SS | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2005 | Chevrolet | Impala | Base | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2005 | Chevrolet | Impala | LS | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2005 | Chevrolet | Monte Carlo | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2005 | Pontiac | Grand Prix | — | 3.8L | V6 | N/A | with Single Exhaust; If welded assembly, replace all required parts |
| 2004 | Chevrolet | Impala | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2004 | Chevrolet | Impala | SS | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2004 | Chevrolet | Impala | Base | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2004 | Chevrolet | Impala | LS | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2004 | Chevrolet | Monte Carlo | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2003 | Chevrolet | Impala | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2003 | Chevrolet | Impala | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2003 | Chevrolet | Monte Carlo | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2002 | Chevrolet | Impala | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2002 | Chevrolet | Impala | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2002 | Chevrolet | Monte Carlo | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2001 | Chevrolet | Impala | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2001 | Chevrolet | Impala | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2001 | Chevrolet | Monte Carlo | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2000 | Chevrolet | Impala | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts |
| 2000 | Chevrolet | Impala | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
| 2000 | Chevrolet | Monte Carlo | — | 3.4L | V6 | N/A | If welded assembly, replace all required parts |
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