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WALKER - Exhaust Muffler - 21539
WALKER - Exhaust Muffler - 21539
WALKER - Exhaust Muffler - 21539
WALKER - Exhaust Muffler - 21539
WALKER - Exhaust Muffler - 21539
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WALKER - Exhaust Muffler - 21539

WALKER
WAL21539
In stock
Muffler
$203.41 $186.99
Product Description The WALKER 21539 Quiet-Flow® SS Exhaust Muffler brings premium exhaust performance, OE-style acoustics, and...
$186.99
WALKER - Exhaust Muffler - 21539
Description

Product Description

The WALKER 21539 Quiet-Flow® SS Exhaust Muffler brings premium exhaust performance, OE-style acoustics, and long-lasting durability to Ford F-150 and Lincoln Mark LT trucks. Constructed with a 100% stainless-steel muffler body, it far outperforms aluminized mufflers with superior corrosion resistance and extended service life.

OE-style hangers and pipe routing allow for a true direct-fit, bolt-on installation, requiring no welding or custom fabrication. The Quiet-Flow® SS design integrates domed heads and louvered tubes for excellent noise reduction while maintaining strong exhaust flow for reliable engine performance.

Each unit is acoustic- and flow-tested to ensure OE-level sound quality and consistent operation. Backed by a limited lifetime warranty and Walker’s Safe and Sound® Guarantee, this muffler delivers exceptional value and long-term dependability.

Key Features

  • 100% Stainless-Steel Construction for superior corrosion resistance

  • Direct-Fit Replacement with OE-style hangers and pipe routing

  • Premium Acoustic Control from OE-style louvered tubes and domed heads

  • Reinforced Mechanical Joints and spun-locked heads for extended durability

  • Internal Drainage System minimizes moisture buildup to prevent rust

  • Flow & Acoustic Tested for true OE-style sound and performance

  • Backed by a Limited Lifetime Warranty and 90-Day Safe and Sound® Guarantee

Technical Specifications

Specification Detail
Shape Oval
Finish Aluminized
Body Material Stainless Steel
Inlet Type Pipe Connection
Outlet Type Pipe Connection
Inlet Inside Diameter 2.500 in
Outlet Inside Diameter 2.500 in
Body Height 7.000 in
Body Length 28.000 in
Body Width 9.000 in
Inlet Location Offset
Outlet Location Offset
Inlet Quantity 1
Outlet Quantity 1
Inlet Offset 1.625 in
Overall Length 32.000 in
Reversible No
Tunable No
Grade Type Premium
Universal or Specific Fit Specific

Vehicle Compatibility

Ford

F-150

  • 2004–2008

    • 4.6L V8 281 cid

    • Qty: 1

  • 2005–2008

    • 4.2L V6 256 cid

    • Qty: 1

  • 2004–2008

    • 5.4L V8 330 cid

    • Qty: 1

Lincoln

Mark LT

  • 2006–2008

    • 5.4L V8 330 cid

    • Qty: 1

Installation & Warranty Notes

  • Direct-fit installation—no cutting or welding required

  • Stainless-steel body delivers maximum durability and corrosion resistance

  • Engineered for OE-style noise reduction and exhaust flow

  • Protected by Walker’s limited lifetime warranty

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Shipping

Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.

Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.

Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.

Returns

Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.

Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.

Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.

Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).

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