Product Description
The WALKER 18439 SoundFX® Exhaust Muffler is designed as a premium, direct-fit replacement for select Chevrolet Cavalier and Pontiac Sunfire models. Constructed from 100% aluminized steel, this SoundFX® muffler provides superior corrosion resistance and longer service life than standard low-carbon steel units.
Featuring internal partitions, mechanically joined tubes, and spun-locked heads, this muffler withstands thermal expansion and contraction while maintaining structural integrity. OE-style louvered tubes help reduce radiated noise, restoring factory-style sound quality. An internal drainage system further enhances durability by limiting moisture buildup.
With OE-style pipe routings and a direct-fit pipe connection inlet, installation is simple—no welding or specialized fabrication required. Designed and tested to extend service life, the WALKER 18439 provides dependable operation, quiet performance, and proper fit.
Key Features
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Aluminized steel construction improves corrosion resistance and longevity
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Direct-fit bolt-on replacement—no welding or fabrication required
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Durable internal design with partitions and mechanically joined tubes
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OE-style acoustics from noise-reducing louvered tubes
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Internal moisture drainage system enhances long-term durability
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Spun-locked heads and OE-style spot welds for added stability
Technical Specifications
| Specification |
Detail |
| Shape |
Oval |
| Finish |
Aluminized |
| Body Material |
Steel |
| Inlet Type |
Pipe Connection |
| Outlet Type |
Tip |
| Inlet Inside Diameter |
2.000 in |
| Outlet Outside Diameter |
1.750 in |
| Inlet Location |
Offset |
| Inlet Quantity |
1 |
| Outlet Location |
Center |
| Outlet Quantity |
1 |
| Body Height |
5.500 in |
| Body Length |
18.000 in |
| Body Width |
11.000 in |
| Overall Length |
27.500 in |
| Inlet Offset |
3.500 in |
| Hanger Included |
No |
| Reversible |
No |
| Tunable |
No |
| Universal or Specific Fit |
Specific |
| Grade Type |
Premium |
Vehicle Compatibility
(All applications listed require one muffler per vehicle and provide direct-fit compatibility.)
Chevrolet – Cavalier
2.2L L4 (2190cc / 134 cid)
2.4L L4 (2392cc / 146 cid)
2.2L L4 (2198cc / 134 cid)
Pontiac – Sunfire
2.2L L4 (2190cc / 134 cid)
2.2L L4 (2198cc / 134 cid)
2.4L L4 (2392cc / 146 cid)
Installation & Warranty Notes
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Direct-fit installation with OE-style pipe connections—no welding required
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Check exhaust hangers and hardware for wear; replace as needed
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Ensure proper outlet alignment to avoid exhaust leaks
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Walker SoundFX® systems are engineered for long service life and OE-style sound control
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Muffler is not reversible—match inlet/outlet orientation to OE setup
