Product Description
The WALKER 18948 SoundFX® Exhaust Muffler is a high-quality, direct-fit replacement designed to restore OE-style sound, performance, and reliability on select Chevrolet Impala and Monte Carlo models. Built from 100% aluminized steel, this muffler offers superior corrosion protection and extended service life compared to standard low-carbon steel units.
Internal partitions, mechanically joined tubes, and spun-locked heads provide long-lasting durability and allow for controlled thermal expansion without distortion. The integrated internal drainage system further enhances longevity by helping reduce moisture buildup.
Engineered with OE-style louvered tubes, the 18948 delivers factory-correct acoustic performance—minimizing radiated noise while preserving the smooth exhaust tone expected from an original-equipment system. With OE-style hangers and pipe routings already installed, this muffler bolts on easily with no welding or custom fabrication required.
Key Features
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Aluminized Steel Construction for increased corrosion resistance and long service life
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Direct-Fit Bolt-On Replacement using OE-style hangers and brackets
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Durable Mechanical Design with internal partitions and spun-locked heads
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Factory-Style Sound from louvered noise-control tubes
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Internal Drainage System helps prevent moisture-related corrosion
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Premium Quality Construction for dependable day-to-day performance
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Designed & Tested to maximize muffler longevity
Technical Specifications
| Specification |
Detail |
| Shape |
Oval |
| Finish |
Aluminized |
| Body Material |
Steel |
| Inlet Type |
Pipe Connection |
| Outlet Type |
Tip |
| Inlet Inside Diameter |
2.250 in |
| Outlet Outside Diameter |
2.250 in |
| Inlet Location |
Offset |
| Inlet Quantity |
1 |
| Outlet Location |
Center |
| Outlet Quantity |
1 |
| Body Height |
5.500 in |
| Body Length |
15.000 in |
| Body Width |
11.000 in |
| Overall Length |
27.250 in |
| Inlet Offset |
3.750 in |
| Hanger Included |
Yes |
| Reversible |
No |
| Tunable |
No |
| Universal or Specific Fit |
Specific |
| Grade Type |
Premium |
Vehicle Compatibility
(All applications are direct-fit; one muffler required per vehicle.)
Chevrolet – Impala
3.5L V6 (3490cc / 213 cid)
Chevrolet – Monte Carlo
3.5L V6 (3490cc / 213 cid)
Installation & Warranty Notes
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Direct-fit bolt-on installation with OE-style hangers
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Inspect existing clamps, gaskets, and rubber hangers before installation
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Ensure proper fit before fully tightening connections
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SoundFX® mufflers deliver OE-level sound and longevity
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Install with proper orientation—muffler is non-reversible
