Walker 18987 Exhaust Muffler

Brand	Walker 18987
Muffler Type	Reflection
Universal Or Specific Fit	Specific
Shape	Oval
Grade Type	Regular
Inlet Inside Diameter	2.5
Body Width	9
Outlet Inside Diameter	2.625
Outlet Quantity	1
Reversible	No
Tunable	No
Overall Length	28
Body Height	7
Body Length	24
Body Material	Steel
Finish	Aluminized
Inlet 1 Inside Diameter	2.5
Inlet 1 Type	Pipe connection
Inlet 2 Inside Diameter	2.5
Inlet 2 Type	Pipe connection
Inlet Configuration	Dual
Inlet Offset	2.625
Inlet Quantity	2
Inlet Type	Pipe connection
Outlet 1 Inside Diameter	2.625
Outlet 1 Type	Pipe connection
Outlet Configuration	Offset
Outlet Type	Pipe connection
Product line	SoundFX Direct Fit
Fits	Cadillac, GMC, and Hummer · 30 vehicles

Direct-fit design. Built for specific exhaust applications with a factory-style replacement layout.

Aluminized steel. Helps extend service life compared with low-carbon steel construction.

SoundFX Direct Fit. Walker's application-specific muffler line for controlled exhaust acoustics.

Cross-references AP Exhaust 700468 and Davico Mfg 291423 for the same application. See all 2.

$81.93Free shipping

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Direct-Fit Muffler for GM SUVs

Walker SoundFX Direct Fit muffler part number 18987 is built for specific applications and uses a reflection-style design to deliver controlled exhaust sound. It is a direct-fit exhaust muffler for select Cadillac, GMC, and Hummer models, with aluminized steel construction for improved service life versus low-carbon steel.

Key Features

Specific-fit exhaust muffler for select GM full-size SUVs and trucks
Reflection muffler design for favorable acoustics
100% aluminized steel construction for corrosion resistance
Mechanical interior joints and spun-locked heads for added durability
Oval steel body with dual 2.5-inch inlets and a 2.625-inch outlet
Walker SoundFX Direct Fit line for application-specific exhaust replacement

Detailed Description

Walker 18987 is an exhaust muffler from the SoundFX Direct Fit line, engineered as a specific replacement for select Cadillac Escalade, Cadillac Escalade ESV, Cadillac Escalade EXT, GMC Yukon, GMC Yukon XL 1500, and Hummer H2 applications. The oval aluminized-steel body measures 28 inches overall, with a 24-inch body length, 9-inch body width, and 7-inch body height. Dual 2.5-inch pipe connections feed an offset 2.625-inch outlet, supporting a direct-fit exhaust service solution for vehicles that require this configuration. This part cross-references AP Exhaust 700468 and Davico Mfg 291423 for the same application.

What It Helps Address

Exhaust noise that has become louder or harsher over time
Rust-related muffler deterioration on aluminized or steel exhaust systems
Fitment issues when replacing a factory-style muffler on select GM SUVs
Service needs on welded exhaust assemblies where related parts must be replaced together
Loss of proper exhaust tone after muffler damage or internal wear

Installation Notes and Tips

Fits 2005-2006 Cadillac Escalade, N/A; Fits 2005-2006 Cadillac Escalade ESV, N/A; Fits 2005-2006 Cadillac Escalade EXT, N/A; Fits 2001-2006 GMC Yukon, N/A; Fits 2005-2006 GMC Yukon XL 1500, N/A; Fits 2003-2006 Hummer H2, N/A; Fits 2002-2004 Cadillac Escalade, N/A; Fits 2003-2004 Cadillac Escalade ESV, N/A; Fits 2002-2004 Cadillac Escalade EXT, N/A; Fits 2001-2004 GMC Yukon XL 1500, N/A. Review the vehicle's exhaust layout before installation, especially on welded assemblies, where related sections may need to be replaced together. Confirm inlet and outlet sizing against the existing system before ordering.

Quality Assurance

Walker uses aluminized steel, mechanical interior joints, and spun-locked heads to support durability and a quality finish in the SoundFX Direct Fit line.

This part fits 30 vehicles

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

Year	Make	Model	Submodel	Liters	Cylinders	Notes
2006	Cadillac	Escalade	Base	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	Cadillac	Escalade ESV	—	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	Cadillac	Escalade EXT	—	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	GMC	Yukon	Denali	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	GMC	Yukon XL 1500	—	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2006	Hummer	H2	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Cadillac	Escalade	Base	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Cadillac	Escalade ESV	—	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Cadillac	Escalade EXT	—	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	GMC	Yukon	Denali	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	GMC	Yukon XL 1500	—	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2005	Hummer	H2	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Cadillac	Escalade	Base	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Cadillac	Escalade ESV	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Cadillac	Escalade EXT	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2004	GMC	Yukon	Denali	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2004	GMC	Yukon XL 1500	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2004	Hummer	H2	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Cadillac	Escalade	Base	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Cadillac	Escalade ESV	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Cadillac	Escalade EXT	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2003	GMC	Yukon	Denali	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2003	GMC	Yukon XL 1500	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2003	Hummer	H2	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2002	Cadillac	Escalade	Base	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2002	Cadillac	Escalade EXT	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2002	GMC	Yukon	Denali	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2002	GMC	Yukon XL 1500	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
2001	GMC	Yukon	Denali	6.0L	V8	Except 20" Wheels; If welded assembly, replace all required parts; SoundFX Direct Fit
2001	GMC	Yukon XL 1500	—	6.0L	V8	If welded assembly, replace all required parts; SoundFX Direct Fit
No rows match your filter.

Directly replaces or cross-references 2 part numbers

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

AP Exhaust — 700468Davico Mfg — 291423