Product Description
The Walker® Quiet-Flow® SS 21289 muffler delivers long-lasting performance, excellent corrosion resistance, and OE-style sound for GM full-size SUVs. Constructed with 100% stainless-steel internals and an aluminized exterior, this premium muffler provides superior durability over standard aluminized-only units.
OE-style hangers and pipe routing ensure an easy bolt-on installation. Louvered tubes and domed heads help reduce radiated noise, giving your vehicle quiet, factory-grade exhaust sound. Each unit is acoustically and flow-tested to meet or exceed OE performance.
Key Features
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100% Stainless-Steel Construction inside for maximum corrosion protection
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Direct-Fit Design: OE-style hangers & layout for fast installation
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Premium Acoustic Control: Louvered tubes reduce radiated sound
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Durable, Long-Life Build: Spun-locked heads and mechanical joints resist distortion
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OE-Style Performance: Designed and tested to match factory sound & flow
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Backed by Walker's Limited Lifetime Warranty
Technical Specifications
| Specification |
Detail |
| Shape |
Oval |
| Finish |
Aluminized |
| Inlet Type |
Pipe Connection |
| Outlet Type |
Pipe Connection |
| Inlet Inside Diameter |
2.000 in |
| Body Height |
7.000 in |
| Body Length |
22.000 in |
| Body Width |
9.000 in |
| Overall Length |
26.000 in |
| Inlet Location |
Offset |
| Outlet Location |
Offset |
| Inlet Quantity |
2 |
| Outlet Quantity |
1 |
| Body Material |
Stainless Steel |
| Hanger Included |
Yes |
| Reversible |
No |
| Outlet Outside Diameter |
2.750 in |
| Universal or Specific Fit |
Specific |
| Grade Type |
Premium |
| Inlet Offset |
1.625 in |
Vehicle Compatibility
Cadillac
Chevrolet
GMC
Installation & Notes
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Direct-fit design: Uses factory-style hangers and routing for easy installation
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No welding required: Bolts directly to OEM exhaust components
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Non-reversible: Must be installed in the correct flow direction
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Inspect clamps & gaskets: Replace if worn or corroded for proper sealing
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Stainless-steel internal construction extends life in harsh climates
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Professional installation recommended
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Always verify inlet configuration (dual) matches your original part