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Walker 21565 Exhaust Muffler - Rear
| Brand | Walker 21565 |
|---|---|
| Position | Rear |
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 2.5 |
| Body Width | 9 |
| Inlet Quantity | 1 |
| Outlet Inside Diameter | 2.25 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 20.25 |
| Body Height | 7 |
| Body Length | 16 |
| Body Material | Stainless steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 2.5 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 2 |
| Inlet Type | Pipe connection |
| 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 | Ford and Mercury · 14 vehicles |
100% stainless steel. Built for corrosion resistance and long service life.
Precision fit. Helps simplify installation with an OE-style replacement.
OE-style sound. Delivers a refined exhaust note without harshness.
Cross-references 6L2Z5230BJ, 7L2Z5230B and 8A2Z5230B for the same application. See all 3.
Walker Quiet-Flow SS Muffler for Explorer and Mountaineer
Walker Quiet-Flow SS Part Number 21565 is a specific-fit exhaust muffler built with stainless-steel construction and an OE-style sound profile. It is engineered for rear exhaust replacement on select Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer applications.
Key Features
- Specific-fit exhaust muffler for direct application matching
- 100% stainless-steel body construction for corrosion resistance
- Oval muffler shape with a 16-inch body length
- 2.5-inch offset inlet and 2.25-inch offset outlet
- Combination muffler design with OE-style sound characteristics
- Aluminized finish
- Walker Quiet-Flow SS product line for domestic and import vehicle coverage
Product Details
The Walker Quiet-Flow SS line focuses on stainless-steel mufflers with precision fit and controlled exhaust flow. Part Number 21565 uses a 9-inch body width, 7-inch body height, and 20.25-inch overall length, making it a practical replacement for rear exhaust service where factory-style sound and fitment matter. This part cross-references 6L2Z5230BJ and 7L2Z5230B for the same application.
Compatible With 2006-2010 Ford Explorer, rear; 2007-2010 Ford Explorer Sport Trac, rear; and 2006-2010 Mercury Mountaineer. Use Walker 21565 when replacing a worn muffler on these vehicles and maintaining an OE-style exhaust note.
Common Exhaust Issues It Can Address
- Rust-through or corrosion in the muffler body
- Excessive exhaust noise from a failing rear muffler
- Restricted exhaust flow caused by internal deterioration
- Fitment problems when replacing a factory-style muffler
- Loss of original exhaust tone on Explorer, Explorer Sport Trac, or Mountaineer models
Installation Notes and Tips
Verify inlet and outlet diameters, offset configuration, and overall length before installation. This muffler uses pipe connections and is not reversible or tunable. If the exhaust assembly is welded, replace all required related parts during service to ensure proper alignment and sealing. Confirm rear-position fitment for the specific vehicle before beginning installation.
Quality Assurance
Walker Quiet-Flow SS mufflers are built with stainless-steel construction and designed for precision fit and OE-style sound control. Part Number 21565 is backed by the application coverage listed for 2006-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, and 2006-2010 Mercury Mountaineer.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2010 | Ford | Explorer | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2010 | Ford | Explorer Sport Trac | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2010 | Mercury | Mountaineer | 4.6L | V8 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2009 | Ford | Explorer | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2009 | Ford | Explorer Sport Trac | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2009 | Mercury | Mountaineer | 4.6L | V8 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2008 | Ford | Explorer | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2008 | Ford | Explorer Sport Trac | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2008 | Mercury | Mountaineer | 4.6L | V8 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2007 | Ford | Explorer | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2007 | Ford | Explorer Sport Trac | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2007 | Mercury | Mountaineer | 4.6L | V8 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | Ford | Explorer | 4.6L | V8 | Rear | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2006 | Mercury | Mountaineer | 4.6L | V8 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
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