Walker 18339 Exhaust Muffler

Name: Walker 18339 Exhaust Muffler
Brand: Walker
SKU: BDCN-18339
Price: 73.55 USD
Availability: InStock

SoundFX Direct Fit

31 vehicles fit this part

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

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OE Direct Replacement — Bolt-on fit, no modifications needed

SoundFX Direct Fit

Fitment: Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac, Brougham, Caprice, Commercial Chassis, Custom Cruiser, Impala, Parisienne, and Roadmaster

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Not what you need? See all Exhaust Muffler options

Overview of Walker SoundFX Direct Fit Exhaust Muffler 18339

The Walker SoundFX Direct Fit Exhaust Muffler 18339 is designed specifically for select Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models. Engineered to provide a precise fit and reliable performance, this muffler is an ideal replacement for vehicles such as the Caprice, Impala, Brougham, and Roadmaster.

Specific fit for Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models
Oval-shaped steel body with aluminized finish for corrosion resistance
2.5-inch inlet and outlet inside diameters with offset pipe connections
Combination muffler type with a 23-inch overall length
Non-reversible design with a single inlet and outlet

Product Features and Specifications

This exhaust muffler features a durable steel body finished with aluminized coating to resist rust and extend service life. The oval shape measures 9.75 inches in width, 4.25 inches in height, and 19 inches in body length, providing a compact yet effective design. Both the inlet and outlet have a 2.5-inch inside diameter with offset pipe connection configurations, ensuring compatibility with specific exhaust systems. The muffler is a combination type, designed to balance sound reduction and exhaust flow without tunability or reversibility.

Walker SoundFX Direct Fit Product Line

The SoundFX Direct Fit line by Walker focuses on delivering exhaust components that match original equipment specifications for a direct replacement. This product line emphasizes precise fitment and sound control tailored to specific vehicle applications, reducing installation time and maintaining factory performance characteristics. The 18339 muffler is part of this line, engineered to meet the demands of classic and full-size GM vehicles.

Compatible Vehicles and Applications

Buick Brougham and Roadmaster
Cadillac Commercial Chassis and Custom Cruiser
Chevrolet Caprice and Impala
Oldsmobile Parisienne
Pontiac models requiring a 2.5-inch inlet/outlet muffler

Common Issues Addressed by This Muffler

Excessive exhaust noise due to worn or damaged muffler
Corrosion and rust compromising exhaust system integrity
Reduced engine performance from exhaust leaks
Failed emissions tests related to muffler condition
Fitment problems with universal mufflers on specific GM models

Installation Notes and Tips

This muffler is designed for direct fit installation on compatible Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac vehicles. Ensure the inlet and outlet pipe diameters match the existing exhaust system (2.5 inches). The offset pipe connections require proper alignment during installation to avoid exhaust leaks. Professional installation is recommended to maintain exhaust system integrity and performance.

Quality Assurance and Warranty

Walker manufactures this muffler with high-grade steel and an aluminized finish to provide durability and corrosion resistance. While specific warranty details are not provided, Walker products typically meet or exceed OEM standards for quality and fitment. Using the Walker SoundFX Direct Fit 18339 muffler helps maintain the original exhaust system performance on your Buick, Cadillac, Chevrolet, Oldsmobile, or Pontiac vehicle.

Brand	Walker
Part Number	18339
Position	SoundFX Direct Fit
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	23
Body Height	4.25
Body Length	19
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	Offset
Outlet Type	Pipe connection

This part fits 31 vehicles. Search below:

Year	Make	Model	Submodel	Body Type	Drive Type	Liters	Cylinders	Position	Notes
1993	Buick	Roadmaster				5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1993	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1993	Chevrolet	Caprice		Wagon		5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1993	Chevrolet	Caprice		Sedan		5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Buick	Roadmaster				5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Cadillac	Brougham			RWD	5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Cadillac	Brougham			RWD	5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Cadillac	Commercial Chassis	Brougham		RWD	5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Chevrolet	Caprice				5.7L	V8	N/A	with Police Package; If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Chevrolet	Caprice		Wagon		5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Oldsmobile	Custom Cruiser				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1992	Oldsmobile	Custom Cruiser				5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Buick	Roadmaster				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Cadillac	Brougham			RWD	5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Cadillac	Brougham			RWD	5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	Caprice				5.7L	V8	N/A	with Police Package; If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Oldsmobile	Custom Cruiser				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Cadillac	Brougham			RWD	5.7L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	Caprice	Base			5.7L	V8	N/A	with Police Package; If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	Caprice	Base			5.7L	V8	N/A	with Police Package; If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	Pontiac	Parisienne				5.0L	V8	N/A	with 2.5 (in) Muffler Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	Caprice				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	Impala				5.0L	V8	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Pontiac	Parisienne				5.0L	V8	N/A	with 2.5 (in) Muffler Inlet; If welded assembly, replace all required parts; SoundFX Direct Fit

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

This part directly replaces or is cross-referenced with the following part numbers:

700087

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