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Walker 21572 Exhaust Muffler
| Brand | Walker 21572 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 1.75 |
| Body Width | 9 |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 27.75 |
| Body Height | 7 |
| Body Length | 18 |
| Body Material | Stainless steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 1.75 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 2 |
| Inlet Type | Pipe connection |
| Muffler Type | Combination |
| Outlet 1 Outside Diameter | 2 |
| Outlet 1 Type | Tip |
| Outlet Configuration | Offset |
| Outlet Outside Diameter | 2 |
| Outlet Type | Tip |
| Product line | Quiet-Flow SS |
| Fits | Chevrolet · 6 vehicles |
100% stainless steel. Corrosion-resistant construction helps the muffler stand up to harsh exhaust conditions.
Precision fit. Built for a specific application with OE-style sound and superior flow.
Oval combination design. Delivers a balanced exhaust tone in a compact muffler shape.
Cross-references AP Exhaust 2507 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker Quiet-Flow SS Muffler for HHR
Walker Quiet-Flow SS muffler Part Number 21572 is a direct-fit exhaust muffler for select 2006-2011 Chevrolet HHR applications. It uses 100% stainless-steel body construction with an OE-style sound profile, precision fit, and a flow-focused internal design for a clean replacement on the Chevrolet HHR exhaust system.
Key Features
- Specific-fit exhaust muffler for select Chevrolet HHR models
- Oval muffler shape with a combination muffler design
- 100% stainless-steel body construction
- Aluminized finish
- Single 1.75 in. inlet with offset configuration
- Single 2 in. outlet with tip-style outlet configuration
- Overall length: 27.75 in.; body length: 18 in.; body width: 9 in.; body height: 7 in.
- Walker Quiet-Flow SS product line for OE-style sound and fit
Product Details
Walker Quiet-Flow SS is the brand’s stainless-steel muffler line built for direct replacement applications where fit, flow, and sound control matter. Part 21572 is shaped as an oval muffler with offset inlet and outlet placement, making it a fitment-specific solution for the exhaust layout used on 2006-2011 Chevrolet HHR models. This part cross-references AP Exhaust 2507 for the same application.
Fits 2006-2011 Chevrolet HHR, N/A. Fits 2006-2011 Chevrolet HHR, N/A. Fits 2006-2011 Chevrolet HHR, N/A.
Common Exhaust Issues It Can Address
- Rust damage or corrosion in the original muffler body
- Exhaust noise increase from a worn internal muffler core
- Poor exhaust tone after the factory muffler deteriorates
- Fitment problems when replacing a damaged OE-style muffler
- Restricted exhaust flow caused by an aging muffler assembly
Installation Notes and Tips
Verify inlet and outlet diameters, offset configuration, and overall dimensions before installation. This muffler uses pipe connections and is not reversible or tunable, so orientation should match the vehicle’s exhaust routing. For welded assemblies, replace all required related parts during service to maintain proper alignment on the Chevrolet HHR exhaust system.
Quality Assurance
Walker Quiet-Flow SS mufflers are built with stainless-steel construction and are engineered for precision fit and OE-style sound characteristics. Part Number 21572 is listed for 2006-2011 Chevrolet HHR applications and is supported by the Quiet-Flow SS product line’s focus on direct replacement performance.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2011 | Chevrolet | HHR | 2.2L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2010 | Chevrolet | HHR | 2.2L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2009 | Chevrolet | HHR | 2.2L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2008 | Chevrolet | HHR | 2.2L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2007 | Chevrolet | HHR | 2.2L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | Chevrolet | HHR | 2.2L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
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