Walker 18378 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 SoundFX Direct Fit

Walker 18378 Exhaust Muffler

Brand Walker 18378
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 33
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 Center
Inlet Type Pipe connection
Muffler Type Combination
Outlet 1 Inside Diameter 2.5
Outlet 1 Type Pipe connection
Outlet Configuration Offset
Outlet Type Pipe connection
Product line SoundFX Direct Fit
Fits Ford · 24 vehicles

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

Aluminized steel. Helps resist corrosion for longer service life.

Mechanical interior joints. Spun-locked heads add durability and a quality finish.

Cross-references 700434 for the same application. See all 1.

$82.90Free 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 $82.90
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 E-350 Econoline

Walker SoundFX Direct Fit muffler part number 18378 is a specific-fit exhaust muffler for 1988-1996 Ford E-350 Econoline applications. It is built with 100% aluminized steel for improved service life versus low-carbon steel and is shaped for a direct replacement on the listed vehicle.

Key Features

  • Specific-fit exhaust muffler for 1988-1996 Ford E-350 Econoline
  • Oval combination muffler design with center inlet and offset outlet
  • 2.5-inch inlet and 2.5-inch outlet pipe connections
  • Aluminized steel body and finish for corrosion resistance
  • Mechanical interior joints and spun-locked heads for added durability
  • Walker SoundFX Direct Fit line focused on OE-style fit and acoustics
  • Part number 18378 for easy identification

Product Details

Walker SoundFX Direct Fit 18378 is an oval steel muffler with a 33-inch overall length, 28-inch body length, 9.75-inch body width, and 4.25-inch body height. The center inlet and offset outlet layout matches the listed Ford E-350 Econoline exhaust configuration, making it a direct-fit replacement for service work on 1988-1996 models. This part cross-references Monroe Shocks & Struts (e.g., 700434) for the same application.

The SoundFX Direct Fit product line is positioned for drivers who want a replacement muffler with factory-style fitment, controlled exhaust tone, and durable construction. For Ford E-350 Econoline owners searching for a 2.5-inch inlet and outlet muffler, Walker 18378 provides a straightforward replacement option.

Common Problems It Can Address

  • Rusted or perforated muffler body
  • Exhaust noise from a failing internal baffle or chamber
  • Restricted exhaust flow caused by internal deterioration
  • Fitment issues when replacing a worn OE-style muffler
  • Corrosion-related exhaust leaks at the muffler section

Installation Notes and Tips

Fits 1988-1996 Ford E-350 Econoline, N/A. Verify inlet and outlet orientation before installation, since this muffler uses a center inlet and offset outlet configuration. If the vehicle uses a welded assembly, replace all required exhaust sections as noted in the fitment data. Confirm pipe diameter and overall length against the existing exhaust layout before final installation.

Quality Assurance

Walker uses aluminized steel construction, mechanical interior joints, and spun-locked heads to support durability in everyday exhaust service. The SoundFX Direct Fit line is built to deliver a quality appearance and favorable acoustics for the specified Ford E-350 Econoline applications.

Related reading

This part fits 24 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersWheel BasePositionNotes
1996FordE-350 Econoline5.8LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1996FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1995FordE-350 Econoline5.8LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1995FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1994FordE-350 Econoline5.8LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1994FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1993FordE-350 Econoline5.8LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1993FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1992FordE-350 Econoline7.5LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1992FordE-350 Econoline7.5LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1992FordE-350 Econoline5.8LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1992FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1991FordE-350 Econoline7.5LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1991FordE-350 Econoline5.8LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1991FordE-350 Econoline7.5LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1991FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1990FordE-350 Econoline7.5LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1990FordE-350 Econoline5.8LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1990FordE-350 Econoline7.5LV8176.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1990FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1989FordE-350 Econoline7.5LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1989FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1988FordE-350 Econoline7.5LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1988FordE-350 Econoline5.8LV8158.0"N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
700434