Walker 18989 Exhaust Muffler

Brand	Walker 18989
Muffler Type	Reflection
Universal Or Specific Fit	Specific
Shape	Oval
Grade Type	Regular
Body Width	9
Inlet Quantity	1
Outlet Quantity	1
Reversible	No
Tunable	No
Overall Length	39.625
Body Height	7
Body Length	21
Body Material	Steel
Finish	Aluminized
Inlet 1 Type	3 bolt welded flange
Inlet Configuration	Offset
Inlet Offset	2.625
Inlet Type	3 bolt welded flange
Outlet 1 Outside Diameter	2.75
Outlet 1 Type	Pipe connection
Outlet Configuration	Offset
Outlet Outside Diameter	2.75
Outlet Type	Pipe connection
Product line	SoundFX Direct Fit
Fits	Chevrolet and GMC · 42 vehicles

Direct-fit design. Installs as a specific replacement with a bolt-on fit.

Aluminized steel. Helps resist corrosion for longer service life.

Reflection muffler. Delivers a quality appearance with favorable acoustics.

Cross-references 700441 for the same application. See all 1.

$139.80Free shipping

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Walker SoundFX Direct Fit Muffler for GM Vans

Walker SoundFX Direct Fit muffler Part Number 18989 is a specific-fit exhaust muffler built for select Chevrolet Express and GMC Savana vans. It uses an oval steel body with an aluminized finish to support longer service life than low-carbon steel, while the reflection-style design helps deliver controlled exhaust acoustics.

Key Features

Specific-fit exhaust muffler for select Chevrolet Express and GMC Savana applications
Oval body construction with 100% aluminized steel
Reflection muffler type for tuned exhaust sound control
Mechanical interior joints and spun-locked heads for added durability
Single inlet and single outlet layout with offset configuration
3-bolt welded flange inlet and 2.75-inch outlet connection
Walker SoundFX Direct Fit line for OE-style replacement fitment

Product Details

Walker SoundFX Direct Fit Part Number 18989 is engineered as a direct replacement muffler for vans that need a precise exhaust fit and consistent acoustic performance. The aluminized steel body, oval shape, and welded-flange inlet support a durable installation on the exhaust system, while the offset inlet and outlet layout matches the listed vehicle applications. This muffler is listed for 1996-1999 Chevrolet Express 1500 and Express 2500, 1996-1999 GMC Savana 1500 and Savana 2500, plus 1998-2002 Chevrolet Express 3500 and GMC Savana 3500 with the specified GVW and side-exit tail pipe notes. This part cross-references 700441 for the same application.

Common Exhaust Issues It Can Address

Excessive exhaust noise from a worn muffler
Rust-related muffler deterioration on steel exhaust systems
Fitment problems when replacing a welded or direct-fit factory muffler
Loss of proper exhaust tone after corrosion or internal damage
Need for a replacement muffler on select Chevrolet Express and GMC Savana vans

Installation Notes and Tips

Verify the vehicle’s year, model, GVW, and exhaust configuration before installation. This muffler uses a 3-bolt welded flange inlet and pipe connection outlet with offset inlet and outlet positioning, so the existing exhaust layout must match the listed application. For welded assemblies, replace all required parts as noted in the fitment data. Confirm the 2.75-inch outlet size and overall dimensions against the original component before final installation.

Quality Assurance

Walker SoundFX Direct Fit mufflers are built with aluminized steel, mechanical interior joints, and spun-locked heads to support durability and consistent fit. The SoundFX Direct Fit product line focuses on direct replacement exhaust components for vehicles that require OE-style geometry and controlled sound characteristics.

This part fits 42 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
2002	Chevrolet	Express 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	GMC	Savana 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	Chevrolet	Express 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	GMC	Savana 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
2000	Chevrolet	Express 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
2000	GMC	Savana 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	Chevrolet	Express 1500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	Chevrolet	Express 1500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	Chevrolet	Express 2500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	Chevrolet	Express 2500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	Chevrolet	Express 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	GMC	Savana 1500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	GMC	Savana 1500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	GMC	Savana 2500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	GMC	Savana 2500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1999	GMC	Savana 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	Chevrolet	Express 1500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	Chevrolet	Express 1500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	Chevrolet	Express 2500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	Chevrolet	Express 2500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	Chevrolet	Express 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	GMC	Savana 1500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	GMC	Savana 1500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	GMC	Savana 2500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	GMC	Savana 2500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1998	GMC	Savana 3500	6.5L	V8	135.0"	N/A	Over 8500 (lb) GVW; Side Exit Tail Pipe; If welded assembly, replace all required parts; SoundFX Direct Fit
1997	Chevrolet	Express 1500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1997	Chevrolet	Express 1500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1997	Chevrolet	Express 2500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1997	Chevrolet	Express 2500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1997	GMC	Savana 1500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1997	GMC	Savana 1500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1997	GMC	Savana 2500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1997	GMC	Savana 2500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1996	Chevrolet	Express 1500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1996	Chevrolet	Express 1500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1996	Chevrolet	Express 2500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1996	Chevrolet	Express 2500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1996	GMC	Savana 1500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1996	GMC	Savana 1500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1996	GMC	Savana 2500	5.0L	V8	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; SoundFX Direct Fit
1996	GMC	Savana 2500	4.3L	V6	135.0"	N/A	with 8,500 (lb) Gross Vehicle Weight (GVW) & Under; If welded assembly, replace all required parts; 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.

700441

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