Walker 18371 Exhaust Muffler

Brand	Walker 18371
Universal Or Specific Fit	Specific
Shape	Round
Grade Type	Regular
Inlet Inside Diameter	3
Body Width	8.375
Inlet Quantity	1
Outlet Inside Diameter	3
Outlet Quantity	1
Reversible	No
Tunable	No
Overall Length	42.5
Body Height	8.375
Body Length	25
Body Material	Steel
Finish	Aluminized
Inlet 1 Inside Diameter	3
Inlet 1 Type	Pipe connection
Inlet Configuration	Offset
Inlet Offset	2
Inlet Type	Pipe connection
Muffler Type	Combination
Outlet 1 Inside Diameter	3
Outlet 1 Type	Pipe connection
Outlet Configuration	Offset
Outlet Type	Pipe connection
Product line	SoundFX Direct Fit
Fits	Dodge · 30 vehicles

Direct-fit design. Installs as a specific replacement with a straightforward fit.

Aluminized steel. Helps extend service life versus low-carbon steel.

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

Cross-references TYC 700322 for the same application. See all 1.

$128.73Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

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Step 2 — Quantity

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Free returns within 60 days if it doesn't fit when fitment is verified.

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Walker SoundFX Direct Fit Muffler for Cummins Trucks

Walker SoundFX Direct Fit muffler Part Number 18371 is a specific-fit exhaust muffler for select Dodge Cummins 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 factory exhaust path.

Key Features

Specific-fit exhaust muffler for select Dodge D250, D350, W250, and W350 models
Round, combination muffler design with 3-inch inlet and 3-inch outlet
Offset inlet and offset outlet configuration for application-specific fitment
100% aluminized steel body and aluminized finish for corrosion resistance
Mechanical interior joints and spun-locked heads for added durability
Walker SoundFX Direct Fit line focuses on OE-style appearance and controlled exhaust acoustics

Product Details

Walker 18371 is engineered for 1989-1993 Dodge D250, Dodge D350, Dodge W250, and Dodge W350 trucks with Cummins engines. The SoundFX Direct Fit product line is built for replacement use where factory-style fitment, durable construction, and balanced exhaust tone matter. This muffler uses a round steel body measuring 42.5 inches overall, with an 8.375-inch body width and height, and a 25-inch body length.

This part cross-references TYC 700322 for the same application. For buyers searching for a 1989-1993 Dodge D250 muffler, 1989-1993 Dodge W350 exhaust muffler, or Walker 18371 replacement muffler, this unit matches the listed Cummins truck fitment.

Common Problems It Can Address

Rust or corrosion in the original muffler housing
Exhaust noise increase from a worn internal muffler core
Fitment issues when replacing a damaged factory muffler
Reduced exhaust system integrity from deteriorated steel construction
Loss of OE-style exhaust tone on Cummins-equipped Dodge trucks

Installation Notes and Tips

Verify inlet and outlet orientation before installation, since this muffler uses offset pipe connections and is not reversible. Confirm vehicle application by year, model, and Cummins engine configuration before ordering. For best results, inspect adjoining exhaust pipes and hangers for wear during replacement so the new muffler can be installed into a stable exhaust system.

Quality Assurance

Walker SoundFX Direct Fit mufflers are built with aluminized steel, mechanical interior joints, and spun-locked heads to support long-term durability in exhaust service. Part Number 18371 is intended as a direct-fit replacement for the listed Dodge Cummins applications.

This part fits 30 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Wheel Base	Position	Notes
1993	Dodge	D250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1993	Dodge	D250	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1993	Dodge	D350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1993	Dodge	W250	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1993	Dodge	W250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1993	Dodge	W350	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1993	Dodge	W350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1992	Dodge	D250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1992	Dodge	D250	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1992	Dodge	D350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1992	Dodge	W250	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1992	Dodge	W250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1992	Dodge	W350	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1992	Dodge	W350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1991	Dodge	D250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1991	Dodge	D250	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1991	Dodge	D350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1991	Dodge	W250	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1991	Dodge	W250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1991	Dodge	W350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1990	Dodge	D250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1990	Dodge	D250	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1990	Dodge	D350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1990	Dodge	W250	5.9L	L6	149.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1990	Dodge	W250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1990	Dodge	W350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1989	Dodge	D250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1989	Dodge	D350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1989	Dodge	W250	5.9L	L6	131.0"	N/A	with Cummins Engine; SoundFX Direct Fit
1989	Dodge	W350	5.9L	L6	135.0"	N/A	with Cummins Engine; SoundFX Direct Fit
No rows match your filter.

Directly replaces or cross-references 1 part number

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

TYC — 700322