HomeExhaust > MufflersWalker 21563 Exhaust Muffler
Part #: 21563

Walker 21563 Exhaust Muffler

Quiet-Flow SS
15 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Quiet-Flow SS
Fitment: Ford and Mercury, Explorer, Explorer Sport Trac, and Mountaineer
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Quiet-Flow SS Exhaust Muffler 21563

The Walker Quiet-Flow SS Exhaust Muffler 21563 is designed specifically for Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer models. Engineered with durable stainless steel and an aluminized finish, this muffler offers reliable performance and corrosion resistance tailored to your vehicle's exhaust system.

  • Specific fit for Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer
  • Oval-shaped muffler body with 11-inch width and 5.5-inch height
  • Stainless steel construction with aluminized finish for durability
  • 2-inch inlet and outlet pipe connections with offset configuration
  • Combination muffler type with a 25-inch overall length

Detailed Product Features and Specifications

The Walker Quiet-Flow SS 21563 muffler features a specific fitment designed to match the exhaust requirements of select Ford and Mercury SUVs. Its oval body shape measures 11 inches wide, 5.5 inches high, and 21 inches in length, providing an optimal balance between sound attenuation and exhaust flow. The muffler uses a 2-inch inside diameter pipe connection for both inlet and outlet, each configured with an offset of 1.5 inches to align precisely with the vehicle’s exhaust piping.

Constructed from stainless steel, the muffler body is finished with an aluminized coating to resist corrosion and extend service life. This combination muffler type is engineered to reduce noise while maintaining efficient exhaust flow, making it suitable for regular grade applications. The part is not reversible or tunable, ensuring a straightforward replacement process.

Walker Quiet-Flow SS Product Line

The Quiet-Flow SS line by Walker focuses on providing exhaust components that combine stainless steel durability with sound reduction technology. This product line is designed to meet specific vehicle fitments, offering a balance of corrosion resistance and noise control. The 21563 muffler exemplifies these qualities, delivering a tailored solution for Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer models.

Common Applications and Problem Solving

  • Replacement for worn or damaged mufflers on Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer
  • Reduction of excessive exhaust noise due to muffler failure
  • Improvement of exhaust flow and engine performance consistency
  • Corrosion resistance to extend exhaust system lifespan
  • Restoration of proper exhaust backpressure for optimal vehicle operation

Installation Notes and Tips

This muffler is designed for specific fitment and requires matching inlet and outlet pipe diameters of 2 inches. The offset inlet and outlet configuration should be aligned carefully during installation to ensure proper exhaust flow and secure connections. Professional installation is recommended to maintain exhaust system integrity and performance.

Quality Assurance and Warranty

Walker manufactures the Quiet-Flow SS 21563 muffler with high-quality stainless steel and aluminized finishes to ensure durability and resistance to corrosion. While specific warranty details are not provided here, Walker products typically meet industry standards for quality and reliability. Verify warranty coverage with the product documentation or manufacturer.

BrandWalker
Part Number21563
PositionQuiet-Flow SS
Universal Or Specific FitSpecific
ShapeOval
Grade TypeRegular
Inlet Inside Diameter2
Body Width11
Inlet Quantity1
Outlet Inside Diameter2
Outlet Quantity1
ReversibleNo
TunableNo
Overall Length25
Body Height5.5
Body Length21
Body MaterialStainless steel
FinishAluminized
Inlet 1 Inside Diameter2
Inlet 1 TypePipe connection
Inlet ConfigurationOffset
Inlet Offset1.5
Inlet TypePipe connection
Muffler TypeCombination
Outlet 1 Inside Diameter2
Outlet 1 TypePipe connection
Outlet ConfigurationOffset
Outlet TypePipe connection

This part fits 15 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2010FordExplorer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010FordExplorer Sport Trac4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010MercuryMountaineer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009FordExplorer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009FordExplorer Sport Trac4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009MercuryMountaineer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008FordExplorer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008FordExplorer Sport Trac4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008MercuryMountaineer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007FordExplorer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007FordExplorer Sport Trac4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007MercuryMountaineer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006FordExplorer4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006MercuryMountaineerLuxury4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006MercuryMountaineerConvenience4.0LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS

* 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:

6L2Z5230AK7L2Z5230A8A2Z5230A

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.