Walker 18187 Exhaust Muffler

Name: Walker 18187 Exhaust Muffler
Brand: Walker
SKU: BDCN-18187
Price: 63.59 USD
Availability: InStock

SoundFX Direct Fit

⚙️ 112 vehicles fit this part

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

📦SoundFX Direct Fit

🚗Fitment: Chevrolet and GMC, S10, S15, and Sonoma

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Overview of Walker SoundFX Direct Fit Exhaust Muffler 18187

The Walker SoundFX Direct Fit Exhaust Muffler 18187 is designed specifically for Chevrolet and GMC trucks, including the S10, S15, and Sonoma models. This oval-shaped muffler offers a precise fit and reliable performance for your vehicle's exhaust system.

Specific fit for Chevrolet S10, S15, and GMC Sonoma models
Oval body shape with aluminized steel construction
2.25-inch inlet inside diameter with offset pipe connection
Single inlet and outlet with center outlet tip configuration
Overall length of 31.75 inches and body length of 21 inches

Product Line: Walker SoundFX Direct Fit

The SoundFX Direct Fit line by Walker focuses on providing exhaust mufflers engineered for direct replacement applications. This ensures a straightforward installation process without the need for modifications. The 18187 muffler maintains the original equipment specifications, including inlet and outlet sizes, shape, and mounting configuration, making it a reliable choice for maintaining factory exhaust performance on Chevrolet and GMC trucks.

Detailed Product Description

This Walker SoundFX Direct Fit Exhaust Muffler 18187 features a durable aluminized steel body designed to resist corrosion and extend service life. The oval shape and combination muffler type help balance sound attenuation and exhaust flow. With a 2.25-inch inlet inside diameter and an offset inlet configuration of 2.875 inches, it matches the factory exhaust system precisely. The muffler includes one inlet and one outlet, both configured as pipe connections, with a 2-inch outlet diameter centered on the unit. The overall length of 31.75 inches and body dimensions of 21 inches in length, 9.75 inches in width, and 4.25 inches in height ensure a proper fit under the vehicle.

Common Applications and Problem Solving

Replacement for damaged or rusted mufflers on Chevrolet S10, S15, and GMC Sonoma
Restores proper exhaust flow and reduces excessive noise
Eliminates exhaust leaks caused by worn or cracked mufflers
Maintains factory exhaust system performance and emissions compliance
Prevents further corrosion with aluminized steel construction

Installation Notes and Tips

The Walker SoundFX Direct Fit 18187 muffler is designed for direct fit installation on compatible Chevrolet and GMC models. Ensure the vehicle is securely lifted and cooled before beginning installation. Verify inlet and outlet pipe diameters match the existing exhaust system. Due to the specific offset inlet configuration, proper alignment is critical to avoid exhaust leaks. Professional installation is recommended for best results.

Quality Assurance and Warranty

Constructed from aluminized steel, the Walker SoundFX Direct Fit Exhaust Muffler 18187 offers corrosion resistance and durability. While specific warranty details are not provided, Walker products typically meet or exceed OEM standards for quality and fitment, ensuring reliable performance for your Chevrolet S10, S15, or GMC Sonoma exhaust system.

Brand	Walker
Part Number	18187
Position	SoundFX Direct Fit
Universal Or Specific Fit	Specific
Shape	Oval
Grade Type	Regular
Inlet Inside Diameter	2.25
Body Width	9.75
Inlet Quantity	1
Outlet Quantity	1
Reversible	No
Tunable	No
Overall Length	31.75
Body Height	4.25
Body Length	21
Body Material	Steel
Finish	Aluminized
Inlet 1 Inside Diameter	2.25
Inlet 1 Type	Pipe connection
Inlet Configuration	Offset
Inlet Offset	2.875
Inlet Type	Pipe connection
Muffler Type	Combination
Outlet 1 Outside Diameter	2
Outlet 1 Type	Tip
Outlet Configuration	Center
Outlet Outside Diameter	2
Outlet Type	Tip

This part fits 112 vehicles. Search below:

Year	Make	Model	Drive Type	Liters	Cylinders	Wheel Base	Position	Notes
1991	Chevrolet	S10	4WD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	S10	RWD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	S10	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	Chevrolet	S10	4WD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	Sonoma	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	Sonoma	4WD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1991	GMC	Sonoma	4WD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	S10	4WD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	S10	RWD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	S10	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	Chevrolet	S10	4WD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	S15	4WD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	S15	RWD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	S15	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	S15	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1990	GMC	S15	4WD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	S10	4WD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	S10	RWD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	S10	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	Chevrolet	S10	4WD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	S15	4WD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	S15	RWD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	S15	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	S15	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1989	GMC	S15	4WD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	S10	4WD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	S10	RWD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	S10	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	S10	4WD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	Chevrolet	S10	4WD	2.5L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	S15	4WD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	S15	RWD	4.3L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	S15	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	S15	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	S15	4WD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1988	GMC	S15	4WD	2.5L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	S10	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	S10	4WD	2.5L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	Chevrolet	S10	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	S15	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	S15	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	S15	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1987	GMC	S15	4WD	2.5L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	Chevrolet	S10	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	Chevrolet	S10	4WD	2.5L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	Chevrolet	S10	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	GMC	S15	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	GMC	S15	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	GMC	S15	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1986	GMC	S15	4WD	2.5L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	RWD	1.9L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	RWD	2.2L	L4	108.4"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	4WD	1.9L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	4WD	2.5L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	RWD	2.2L	L4	122.9"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	Chevrolet	S10	RWD	2.2L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	RWD	1.9L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	RWD	2.5L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	4WD	1.9L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	RWD	2.2L	L4	122.9"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	RWD	2.2L	L4	108.4"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	RWD	2.2L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1985	GMC	S15	4WD	2.5L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	RWD	2.0L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	RWD	1.9L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	RWD	2.2L	L4	108.4"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	4WD	1.9L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	4WD	2.0L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	RWD	2.2L	L4	122.9"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	Chevrolet	S10	RWD	2.2L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	RWD	1.9L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	RWD	2.0L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	4WD	1.9L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	RWD	2.2L	L4	122.9"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	4WD	2.0L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	RWD	2.2L	L4	108.4"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1984	GMC	S15	RWD	2.2L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	Chevrolet	S10	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	Chevrolet	S10	RWD	2.0L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	Chevrolet	S10	RWD	1.9L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	Chevrolet	S10	4WD	1.9L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	Chevrolet	S10	4WD	2.0L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	Chevrolet	S10	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	GMC	S15	RWD	1.9L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	GMC	S15	RWD	2.8L	V6		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	GMC	S15	RWD	2.0L	L4		N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	GMC	S15	4WD	2.8L	V6	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	GMC	S15	4WD	1.9L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1983	GMC	S15	4WD	2.0L	L4	118.0"	N/A	If welded assembly, replace all required parts; SoundFX Direct Fit
1982	Chevrolet	S10		2.8L	V6	108.4"	N/A	SoundFX Direct Fit
1982	Chevrolet	S10		1.9L	L4	118.0"	N/A	SoundFX Direct Fit
1982	Chevrolet	S10		1.9L	L4	108.4"	N/A	SoundFX Direct Fit
1982	Chevrolet	S10		2.8L	V6	118.0"	N/A	SoundFX Direct Fit
1982	GMC	S15		1.9L	L4	108.4"	N/A	SoundFX Direct Fit
1982	GMC	S15		1.9L	L4	118.0"	N/A	SoundFX Direct Fit
1982	GMC	S15		2.8L	V6	118.0"	N/A	SoundFX Direct Fit
1982	GMC	S15		2.8L	V6	108.4"	N/A	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:

6590700020

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