Product Description
The WALKER 21745 Quiet-Flow® SS Exhaust Muffler delivers premium, OE-style sound control and corrosion resistance for Subaru Forester and Impreza models. Constructed with a 100% stainless-steel muffler body, it offers longer service life than traditional aluminized units. The internal drainage system prevents moisture buildup and rust, ensuring durability even in harsh climates.
Engineered as a direct-fit replacement with OE-style hangers and precise pipe routing, installation is simple and requires no specialized fabrication or welding. The Quiet-Flow® SS design incorporates louvered tubes and domed heads to reduce radiated noise while maintaining optimal exhaust flow.
Backed by Walker’s limited lifetime warranty, this muffler guarantees reliable, factory-grade exhaust performance.
Key Features
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100% Stainless-Steel Muffler Body for maximum resistance to corrosion
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Direct-Fit Installation with OE-style hangers and brackets—no welding required
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Premium Acoustic Control using OE-style domed heads and louvered tubes
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Durable Construction with mechanically joined tubes and spun-locked heads
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Internal Drainage System reduces internal moisture and prevents rust
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Flow & Sound Validated to match OE performance specifications
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Limited Lifetime Warranty & 90-Day Safe and Sound® Guarantee
Technical Specifications
| Specification |
Detail |
| Shape |
Oval |
| Finish |
Natural |
| Body Material |
Stainless Steel |
| Inlet Type |
2 Bolt Welded Flange |
| Outlet Type |
Tip |
| 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 |
| Outlet Outside Diameter |
2.750 in |
| Overall Length |
23.000 in |
| Inlet Offset |
1.625 in |
| Reversible |
No |
| Tunable |
No |
| Universal or Specific Fit |
Specific |
| Grade Type |
Premium |
Vehicle Compatibility
Subaru
Forester
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2011–2013
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2.5L H4 2498cc / 152 cid
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Position: Right
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Qty: 1
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2009–2013
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2.5L H4 2458cc
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Position: Right
-
Qty: 1
Impreza
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2008–2011
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2.5L H4 2458cc
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Position: Right
-
Qty: 1
Installation & Warranty Notes
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Direct-fit bolt-on muffler; no cutting or welding required
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Verify fitment using engine size and muffler side (Right)
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Built from stainless steel for enhanced durability
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Includes Walker’s limited lifetime warranty and 90-Day Safe & Sound® Guarantee
