/live/media/WK/WK_21566_Fro.jpg)
Will it fit your vehicle?
Confirm before you buy. Free return shipping if it doesn't fit.
Walker 21566 Exhaust Muffler
| Brand | Walker 21566 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Body Width | 9 |
| Inlet Quantity | 1 |
| Outlet Inside Diameter | 2.25 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 32 |
| Body Height | 7 |
| Body Length | 24 |
| Body Material | Stainless steel |
| Finish | Aluminized |
| Inlet 1 Type | 2 bolt loose flange with spherical flare |
| Inlet Configuration | Offset |
| Inlet Offset | 1.625 |
| Inlet Type | 2 bolt loose flange with spherical flare |
| Muffler Type | Combination |
| Outlet 1 Inside Diameter | 2.25 |
| Outlet 1 Type | Pipe connection |
| Outlet Configuration | Offset |
| Outlet Type | Pipe connection |
| Product line | Quiet-Flow SS |
| Fits | Lincoln · 3 vehicles |
100% stainless steel. Corrosion-resistant construction helps extend muffler life.
Precision fit. OE-style replacement with superior flow and sound.
Oval combination design. Delivers a compact muffler layout with pipe connections.
Cross-references AP Exhaust 2479 and AP Exhaust 18179 for the same application. See all 2.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker Quiet-Flow SS Muffler for Lincoln Aviator
Walker Quiet-Flow SS 21566 is a specific-fit exhaust muffler built for the 2003-2005 Lincoln Aviator. It uses 100% stainless-steel body construction with an OE-style sound profile and precision fitment for a direct replacement application.
Key Features
- Specific-fit exhaust muffler for 2003-2005 Lincoln Aviator
- 100% stainless-steel body construction
- Oval muffler body with offset inlet and offset outlet configuration
- 2.25-inch inlet and 2.25-inch outlet inside diameter
- 2-bolt loose flange with spherical flare inlet connection
- Walker Quiet-Flow SS line focuses on OE-style sound and controlled exhaust flow
- Part number 21566 for application matching and catalog lookup
Product Details
The Walker Quiet-Flow SS line is built for drivers who want a replacement muffler with a factory-style sound character and a precise fit. This Walker 21566 muffler uses an oval body design measuring 24 inches long, 9 inches wide, and 7 inches high, with a 32-inch overall length. The stainless-steel body helps support long-term exhaust service in demanding conditions, while the offset inlet and outlet layout matches the listed Lincoln Aviator application. This part cross-references AP Exhaust (e.g., 2479, 18179) for the same application.
Common Problems This Part Can Address
- Exhaust noise from a worn or rusted muffler
- Restricted exhaust flow caused by internal muffler deterioration
- Fitment issues when replacing the original Lincoln Aviator muffler
- Corrosion-related failure in the muffler body
- Loss of OE-style exhaust tone after muffler damage
Installation Notes and Tips
Compatible With 2003-2005 Lincoln Aviator, N/A. Verify inlet and outlet orientation, flange style, and overall dimensions before installation. If the original system uses a welded assembly, replace all required related exhaust parts during service to maintain proper alignment and sealing. Confirm the 2.25-inch pipe connection size matches the existing exhaust layout before final assembly.
Quality Assurance
Walker positions Quiet-Flow SS mufflers as a stainless-steel replacement line with precision fit and OE-style sound characteristics. For this application, the listed fitment includes Premium and Limited Lifetime Warranty notes.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2005 | Lincoln | Aviator | 4.6L | V8 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2004 | Lincoln | Aviator | 4.6L | V8 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2003 | Lincoln | Aviator | 4.6L | V8 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| No rows match your filter. | ||||||