Product Description
The Walker SoundFX® 18978 Direct-Fit Exhaust Muffler is engineered with 100% aluminized steel for superior corrosion resistance and longer service life compared to standard low-carbon steel. Designed for Jeep Wrangler models, this premium muffler delivers quality factory-style sound, strong durability, and a reliable direct-fit installation.
Mechanical interior joints and spun-locked heads improve structural strength, while internal louvered tubes help reduce radiated noise for OE-style acoustics. With OE-style hangers, brackets, and routing, this muffler installs easily without the need for welding or custom fabrication.
Features
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Corrosion-Resistant Aluminized Steel for longer service life
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Mechanically Joined Tubes & Internal Partitions to resist distortion
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OE-Style Fitment—direct bolt-on replacement for simple installation
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Factory-Quality Sound thanks to louvered tube design
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Durable Spun-Locked Heads stand up to backpressure and temperature cycling
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Premium Grade Construction ensures long-term reliability
Exhaust Muffler Dimensions
| Specification |
Value |
| Shape |
Oval |
| Finish |
Aluminized |
| Outlet Location |
Offset |
| Inlet Type |
2 Bolt Welded Flange |
| Outlet Type |
Pipe Connection |
| Body Height |
4.250 in |
| Body Length |
18.000 in |
| Body Width |
9.750 in |
| Hanger Included |
No |
| Inlet Location |
Center |
| Inlet Quantity |
1 |
| Body Material |
Steel |
| Outlet Inside Diameter |
2.250 in |
| Outlet Quantity |
1 |
| Reversible |
No |
| Tunable |
No |
| Universal or Specific Fit |
Specific |
| Grade Type |
Premium |
| Overall Length |
22.000 in |
Vehicle Fitment
| Make |
Model |
Year Range |
Position |
Drive Wheel |
Engine |
| Jeep |
Wrangler |
2003–2006 |
Exhaust Muffler |
— |
2.4L L4 148cid |
| Jeep |
Wrangler |
2000–2006 |
Exhaust Muffler |
— |
4.0L L6 242cid |
| Jeep |
Wrangler |
2000–2002 |
Exhaust Muffler |
— |
2.5L L4 150cid |
Installation & Notes
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Direct-fit design — no welding or fabrication required
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Designed specifically for Jeep Wrangler exhaust routing
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Not reversible — install according to inlet/outlet orientation
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Reuse or replace hangers as needed (hangers not included)
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Ensure flange compatibility with your OE exhaust system