Walker 18373 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 SoundFX Direct Fit

Walker 18373 Exhaust Muffler

Brand Walker 18373
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Inlet Inside Diameter 2.5
Body Width 9.75
Inlet Quantity 1
Outlet Inside Diameter 2.5
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 41
Body Height 4.25
Body Length 28
Body Material Steel
Finish Aluminized
Inlet 1 Inside Diameter 2.5
Inlet 1 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 2.875
Inlet Type Pipe connection
Muffler Type Combination
Outlet 1 Inside Diameter 2.5
Outlet 1 Type Pipe connection
Outlet Configuration Center
Outlet Type Pipe connection
Product line SoundFX Direct Fit
Fits Ford · 38 vehicles

Direct-fit design. Installs as a specific-fit exhaust muffler with no guesswork.

Aluminized steel. Helps resist corrosion for longer service life than low-carbon steel.

Mechanical interior joints. Spun-locked heads add durability and help maintain a quality appearance.

$98.83Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $98.83
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Exhaust Muffler options

Walker SoundFX Direct Fit Muffler for Ford Trucks

Walker SoundFX Direct Fit muffler Part Number 18373 is a specific-fit exhaust muffler built for select Ford F-250, F-250 HD, and F-350 applications. It uses an oval steel body with an aluminized finish to support longer service life than low-carbon steel while maintaining a clean OE-style appearance and controlled exhaust tone.

Key Features

  • Specific-fit exhaust muffler for select Ford truck applications
  • Oval combination muffler design with 2.5 in. inlet and 2.5 in. outlet
  • Offset inlet and center outlet configuration
  • 100% aluminized steel construction for improved corrosion resistance versus low-carbon steel
  • Mechanical interior joints and spun-locked heads for added durability
  • Walker SoundFX Direct Fit line for OE-style fit and acoustics
  • Part Number 18373 for application-specific exhaust replacement

Detailed Description

Walker SoundFX Direct Fit Part Number 18373 is engineered for direct replacement use on 1987 Ford F-250, 1996 Ford F-250, 1997 Ford F-250 HD, and 1988-1995 Ford F-350 applications listed below. The muffler measures 41 inches overall, with a 28-inch body, 9.75-inch body width, and 4.25-inch body height. Its 2.5-inch pipe connections, offset inlet, and center outlet support a factory-style exhaust layout for the specified Ford truck fitments. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

The SoundFX Direct Fit product line focuses on replacement mufflers that balance appearance, fit, and exhaust acoustics. For Ford F-250 and Ford F-350 owners seeking a direct-fit muffler replacement, this design provides a practical option for restoring exhaust function without changing the original routing or configuration called out in the fitment data.

Common Issues Addressed

  • Rust-through or corrosion in the original muffler body
  • Exhaust noise caused by a damaged or leaking muffler
  • Poor fit from a universal muffler replacement
  • Need to restore factory-style exhaust routing on Ford F-250 and Ford F-350 trucks
  • Replacement of a worn muffler in welded exhaust assemblies where required parts must be replaced together

Installation Notes and Tips

Verify the vehicle’s GVW and engine-code requirements before ordering, especially for the 1987 Ford F-250 and the 1996-1997 Ford F-250/F-250 HD applications listed. The fitment notes also specify that welded assemblies require replacement of all required parts. Confirm the inlet and outlet orientation, pipe diameter, and available exhaust space before installation. Professional exhaust installation is recommended for proper alignment and sealing.

Quality Assurance

Walker builds this muffler with 100% aluminized steel, mechanical interior joints, and spun-locked heads to support durability in everyday exhaust service. The SoundFX Direct Fit line is positioned for application-specific replacement with OE-style acoustics and appearance.

Compatible Vehicles

  • Fits 1997 Ford F-250 HD, N/A — Over 8500 (lb) GVW; Requires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
  • Fits 1996 Ford F-250, N/A — Over 8500 (lb) GVW; Requires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
  • Fits 1988-1995 Ford F-350, N/A — Requires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
  • Fits 1987 Ford F-250, N/A — Over 8500 (lb) GVW; with Engine Code EFI; Requires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit

Related reading

This part fits 38 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypeTransmissionLitersCylindersWheel BasePositionNotes
1997FordF-250 HD—Manual5.8LV8139.0"N/AOver 8500 (lb) GVW; Requires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1996FordF-250—Manual5.8LV8139.0"N/AOver 8500 (lb) GVW; Requires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1995FordF-350RWD—5.8LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1995FordF-350RWD—5.8LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1994FordF-350RWD—5.8LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1994FordF-350RWD—5.8LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1993FordF-350RWD—5.8LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1993FordF-350RWD—5.8LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1992FordF-3504WD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1992FordF-3504WD—7.5LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1992FordF-350RWD—7.5LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1992FordF-350RWD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1992FordF-350RWD—5.8LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1992FordF-350RWD—5.8LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1991FordF-3504WD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1991FordF-3504WD—7.5LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1991FordF-350RWD—7.5LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1991FordF-350RWD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1991FordF-350RWD—5.8LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1991FordF-350RWD—5.8LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1990FordF-3504WD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1990FordF-3504WD—7.5LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1990FordF-350RWD—7.5LV8168.4"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1990FordF-350RWD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1990FordF-350RWD—5.8LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1990FordF-350RWD—5.8LV8160.8"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1989FordF-3504WD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1989FordF-3504WD—7.5LV8160.8"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1989FordF-350RWD—7.5LV8160.8"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1989FordF-350RWD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1989FordF-350RWD—5.8LV8160.8"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1989FordF-350RWD—5.8LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1988FordF-3504WD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1988FordF-3504WD—7.5LV8160.8"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1988FordF-350RWD—7.5LV8160.8"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1988FordF-350RWD—7.5LV8137.0"N/ARequires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1987FordF-250——7.5LV8133.0"N/AOver 8500 (lb) GVW; with Engine Code EFI; Requires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit
1987FordF-250——7.5LV8—N/AOver 8500 (lb) GVW; with Engine Code EFI; Requires 35276; If welded assembly, replace all required parts; SoundFX Direct Fit