/live/media/WK/WK_21398_Fro.jpg)
OE Quality
60-Day Returns
Walker 21398 Exhaust Resonator
Overview of Walker Exhaust Resonator 21398
The Walker 21398 exhaust resonator is designed for direct fitment on select Buick, Chevrolet, and Pontiac models. Engineered with a durable aluminized steel body, this resonator helps reduce exhaust noise and improve overall vehicle sound quality for models like the Buick LaCrosse and Chevrolet Impala.
- Direct fit for Buick Allure, Chevrolet Monte Carlo, Impala, and Pontiac Grand Prix
- Aluminized steel construction for corrosion resistance
- Round resonator shape with 4-inch body diameter and 26-inch length
- 2.25-inch inlet and outlet diameters with 2 bolt welded flange inlet
- Center inlet and outlet configuration for straightforward installation
Detailed Product Features and Specifications
The Walker 21398 exhaust resonator features a round body shape measuring 4 inches in width and height, with a length of 26 inches. Constructed from aluminized steel, it offers enhanced durability against rust and heat exposure. The inlet uses a 2 bolt welded flange design, ensuring a secure connection, while the outlet is designed for pipe connection with a 2.25-inch inside and outside diameter. This resonator includes one inlet and one outlet, both centrally configured to match the exhaust flow path of compatible vehicles. Its direct fit design simplifies replacement on Buick Allure, Chevrolet Monte Carlo, Impala, and Pontiac Grand Prix models, maintaining factory exhaust performance and sound characteristics.
Applications and Problem Solving
- Reduces unwanted exhaust drone and noise in Buick LaCrosse and Chevrolet Impala
- Restores proper exhaust flow and sound quality for Pontiac Grand Prix
- Replaces damaged or corroded resonators to prevent exhaust leaks
- Helps maintain emissions compliance by ensuring exhaust system integrity
- Improves overall exhaust system performance on Chevrolet Monte Carlo
Installation Notes and Tips
- Designed as a direct fit replacement; minimal modifications required
- Ensure proper alignment of the 2 bolt welded flange inlet for secure mounting
- Check exhaust pipe diameters to confirm 2.25-inch compatibility
- Use appropriate gaskets and hardware to prevent leaks
- Professional installation recommended for optimal fit and performance
Quality Assurance and Warranty
Walker exhaust components are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The aluminized steel construction offers resistance to corrosion and heat damage. While specific warranty details for part number 21398 may vary, Walker typically provides coverage against defects in materials and workmanship. Consult product documentation or authorized sources for exact warranty terms.
| Brand | Walker |
|---|---|
| Part Number | 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 |
This part fits 36 vehicles. Search below:
| 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 |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.