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WALKER - Exhaust Muffler - 21904

WALKER
WAL21904
In stock
Muffler
$208.32 $201.99
Product Description The Walker® Quiet-Flow® SS 21904 muffler is engineered with 100% stainless-steel construction, ensuring exceptional...
$201.99

WALKER - Exhaust Muffler - 21904

Product Description

The Walker® Quiet-Flow® SS 21904 muffler is engineered with 100% stainless-steel construction, ensuring exceptional durability and corrosion resistance compared to aluminized alternatives. With OE-style hangers and pipe routing, this muffler installs easily and delivers the same smooth, controlled exhaust tone as the factory system.

Internally, mechanically joined tubes, louvered sound-control channels, and domed heads help minimize distortion, reduce radiated noise, and provide premium acoustic performance. Designed specifically for Subaru applications, this unit offers long-lasting reliability and OE-correct fitment.


Key Features

  • 100% Stainless-Steel Construction for maximum corrosion protection

  • Direct-Fit Design – OE-style hangers, brackets, and routing

  • Premium Sound Control – Louvered tubes reduce radiated noise

  • Durable Mechanical Construction – Handles thermal expansion without distortion

  • Flow & Sound Tested – Ensures OE-quality performance

  • Backed by Walker’s Limited Lifetime Warranty


Technical Specifications

Specification Detail
Shape Oval
Finish Natural
Inlet Type 2 Bolt Welded Flange
Outlet Type Tip
Body Height 7.000 in
Body Length 13.000 in
Body Width 9.000 in
Overall Length 23.000 in
Inlet Inside Diameter — (Flange type)
Outlet Outside Diameter 2.750 in
Inlet Location Offset
Outlet Location Offset
Inlet Quantity 1
Outlet Quantity 1
Body Material Stainless Steel
Hanger Included Yes
Reversible No
Fitment Specific
Grade Type Premium
Inlet Offset 1.625 in

Vehicle Compatibility

Subaru

  • Forester (2014–2018)

    • 2.5L H4 (2498cc / 152 cid)


Installation & Notes

  • Direct-fit, bolt-on replacement – installation requires no cutting or welding

  • Hangers included – designed to align with factory mounting points

  • Not reversible – install in correct orientation per OE layout

  • Two-bolt flange connection – ensure gasket compatibility when installing

  • Intended for use with factory exhaust system

  • Professional installation recommended to ensure proper sealing and alignment

  • Check heat shield and rubber isolators for wear before installation

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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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