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The WALKER 21763 Quiet-Flow® SS Exhaust Muffler is engineered to deliver OE-style sound, precise fitment, and long-lasting durability for Subaru Outback models equipped with the 3.6L H6 engine. Constructed with a 100% stainless-steel muffler body, this Quiet-Flow® SS unit provides superior corrosion protection compared to aluminized steel alternatives.
Its direct-fit, bolt-on design includes OE-style hangers, brackets, and connections, ensuring quick and hassle-free installation with no need for welding or custom fabrication. The muffler’s louvered tubes and domed heads provide refined acoustic control, reducing noise while maintaining smooth exhaust flow.
Every Quiet-Flow® SS muffler undergoes rigorous flow, acoustic, and durability validation to ensure OE-quality performance. Backed by Walker’s limited lifetime warranty and 90-Day Safe and Sound® Guarantee, the 21763 offers dependable, factory-correct performance.
100% Stainless-Steel Muffler Body for maximum corrosion resistance
Direct-Fit Bolt-On Installation with OE-style brackets and hangers
Premium Acoustic Control using louvered tubes and domed heads
Durable Construction with spun-locked heads and mechanically joined tubes
Moisture-Reducing Internal Drainage System improves service life
Factory-Tested for OE-style sound and exhaust flow
Backed by Walker’s Limited Lifetime Warranty
| Specification | Detail |
|---|---|
| Shape | Oval |
| Finish | Natural |
| Body Material | Stainless Steel |
| Inlet Type | 2 Bolt Welded Flange |
| Outlet Type | Tip |
| Outlet Outside Diameter | 1.750 in |
| Body Height | 7.000 in |
| Body Length | 13.000 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 | 25.500 in |
| Reversible | No |
| Tunable | No |
| Universal or Specific Fit | Specific |
| Grade Type | Premium |
2010–2015
3.6L H6 3630cc
Position: Right
Qty: 1
Direct-fit, bolt-on installation—no welding required
Stainless-steel construction provides exceptional longevity
Engineered for OE-style sound and flow characteristics
Covered by Walker’s limited lifetime warranty and 90-Day Safe and Sound® Guarantee
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.
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).
