Product Description
The WALKER 21525 Quiet-Flow® SS Exhaust Muffler is a premium, direct-fit replacement designed to restore OE-style sound, performance, and exhaust flow for select Buick 3.8L V6 sedans. Featuring 100% stainless-steel construction, this Quiet-Flow SS muffler delivers superior corrosion resistance and longevity over traditional aluminized steel options.
OE-style louvered tubes, domed heads, and precision-engineered internal partitions deliver excellent acoustic control with factory-correct tone. Mechanically joined tubes and spun-locked heads help prevent distortion during heat cycling, ensuring strength and long-term durability.
Designed as a direct-fit, bolt-on solution, the 21525 uses OE-style hangers and pipe routing for fast and easy installation without welding.
Key Features
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100% Stainless-Steel Construction for maximum corrosion resistance
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Direct-Fit Bolt-On Design using OE-style hangers and pipe routings
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OE-Style Acoustic Tuning with louvered tubes and domed heads
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Mechanically Joined Internal Tubes minimize distortion under thermal expansion
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Spun-Locked Heads & Drainage System extend service life and stability
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Flow & Acoustically Tested for OE-style performance and sound quality
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Covered by Walker’s Limited Lifetime Warranty and 90-Day Safe & Sound® Guarantee
Technical Specifications
| Specification |
Detail |
| Shape |
Oval |
| Finish |
Aluminized |
| Body Material |
Stainless Steel |
| Inlet Type |
Pipe Connection |
| Outlet Type |
Tip |
| Inlet Inside Diameter |
2.000 in |
| Outlet Outside Diameter |
2.250 in |
| Inlet Location |
Offset |
| Outlet Location |
Center |
| Inlet Quantity |
1 |
| Outlet Quantity |
1 |
| Body Height |
5.500 in |
| Body Length |
15.000 in |
| Body Width |
11.000 in |
| Overall Length |
21.250 in |
| Inlet Offset |
3.500 in |
| Reversible |
No |
| Tunable |
No |
| Universal or Specific Fit |
Specific |
| Grade Type |
Premium |
Vehicle Compatibility
(One muffler required per vehicle unless otherwise noted.)
Buick
Allure
LaCrosse
Installation & Warranty Notes
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Bolt-on installation with OE-style hangers—no welding needed
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Restores original sound characteristics and exhaust flow
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Replace gaskets and clamps as needed for best sealing
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Designed to outperform aluminized-steel mufflers in longevity and durability
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Backed by Walker’s limited lifetime warranty and 90-Day Safe & Sound® Guarantee
