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Walker 21758 Exhaust Muffler
| Brand | Walker 21758 |
|---|---|
| Finish | Natural |
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 2 |
| Body Width | 11 |
| Inlet Quantity | 1 |
| Outlet Inside Diameter | 1.75 |
| Reversible | No |
| Tunable | No |
| Overall Length | 26 |
| Body Height | 5.5 |
| Body Length | 22 |
| Body Material | Stainless steel |
| Inlet 1 Inside Diameter | 2 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 3.5 |
| Inlet Type | Pipe connection |
| Muffler Type | Combination |
| Outlet 1 Inside Diameter | 1.75 |
| Outlet 1 Type | Pipe connection |
| Outlet 2 Inside Diameter | 1.75 |
| Outlet 2 Type | Pipe connection |
| Outlet Configuration | Dual |
| Outlet Quantity | 2 |
| Outlet Type | Pipe connection |
| Product line | Quiet-Flow SS |
| Fits | Mazda · 8 vehicles |
100% stainless steel. Corrosion-resistant construction for long-lasting exhaust service.
Quiet-Flow SS design. Delivers superior flow with OE-style sound.
Specific fit. Precision fit helps simplify installation.
Cross-references Ansa ST1253S, Walker Exhaust 53899 and Walker Exhaust 53900 for the same application. See all 4.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker Quiet-Flow SS Muffler for Mazda 3
Walker Quiet-Flow SS muffler Part Number 21758 is a direct-fit exhaust muffler for select 2010-2013 Mazda 3 applications. It uses 100% stainless-steel construction, an oval body, and OE-style sound characteristics to support a precise replacement on the Mazda 3 exhaust system.
Key Features
- Specific-fit exhaust muffler for select Mazda 3 models
- 100% stainless-steel body material with natural finish
- Oval muffler body with combination muffler design
- Offset 2-inch inlet with dual 1.75-inch outlets
- Overall length: 26 inches; body length: 22 inches
- Walker Quiet-Flow SS product line focused on fit, flow, and OE-style sound
Product Details
Walker Quiet-Flow SS mufflers are built for domestic and import vehicle applications where a direct replacement is needed. This Part Number 21758 uses a stainless-steel body for corrosion resistance and a specific-fit layout that matches the exhaust routing on compatible vehicles. The offset inlet and dual outlet configuration support the factory-style exhaust path while maintaining the intended sound profile for the 2010-2013 Mazda 3.
This part cross-references Ansa ST1253S for the same application. It also cross-references Walker Exhaust 53899 and 53900 for related fitment references.
What It Helps Address
- Rust or corrosion in the original muffler housing
- Exhaust noise from a worn or damaged muffler
- Restricted exhaust flow caused by internal deterioration
- Fitment issues when replacing a factory-style muffler on a Mazda 3
- Need for a stainless-steel replacement muffler with OE-style sound
Installation Notes
Fits 2010-2013 Mazda 3, N/A. Verify inlet and outlet diameters, offset configuration, and overall length against the existing exhaust before installation. If the original system uses a welded assembly, replace all required parts as needed to complete the repair. Professional exhaust installation is recommended for proper alignment and sealing.
Quality Assurance
Walker Quiet-Flow SS is a stainless-steel muffler line engineered for precise fit and controlled exhaust sound. For this application, the fitment notes list Premium and Limited Lifetime Warranty coverage.
| Year | Make | Model | Submodel | Liters | Cylinders | Notes |
|---|---|---|---|---|---|---|
| 2013 | Mazda | 3 | — | 2.5L | L4 | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2013 | Mazda | 3 | Mazdaspeed | 2.3L | L4 | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2012 | Mazda | 3 | — | 2.5L | L4 | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2012 | Mazda | 3 | Mazdaspeed | 2.3L | L4 | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2011 | Mazda | 3 | — | 2.5L | L4 | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2011 | Mazda | 3 | Mazdaspeed | 2.3L | L4 | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2010 | Mazda | 3 | — | 2.5L | L4 | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2010 | Mazda | 3 | Mazdaspeed | 2.3L | L4 | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
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