Walker 18815 Exhaust Muffler

Walker SoundFX Direct Fit Muffler for Ford and Mercury

Walker SoundFX Direct Fit muffler Part Number 18815 is a specific-fit exhaust muffler built for select Ford Explorer and Mercury Mountaineer applications. It uses 100% aluminized steel for improved service life versus low-carbon steel and is shaped for a quality OE-style appearance with controlled exhaust sound.

• Direct-fit exhaust muffler for specific applications
• Oval body shape with 11 in. body width, 5.5 in. body height, and 20 in. body length
• Overall length: 30.5 in.
• 1 inlet, 1 outlet
• 2.25 in. outlet inside diameter
• 3-bolt welded flange inlet with 3.5 in. offset
• Center outlet pipe connection
• Aluminized steel body and finish
• Mechanical interior joints and spun-locked heads for added durability

SoundFX Direct Fit Product Line

Walker SoundFX Direct Fit is the brand line for applications that call for a direct replacement muffler with a balanced sound profile and OE-style fitment. Part Number 18815 follows that approach with a combination muffler design, welded flange inlet, and pipe-connection outlet for the listed Ford and Mercury vehicles.

Fitment Details

• Fits 1998 Ford Explorer, N/A, before 01/28/1998; if welded assembly, replace all required parts; SoundFX Direct Fit
• Fits 1996-1997 Ford Explorer, N/A; if welded assembly, replace all required parts; SoundFX Direct Fit
• Fits 1998 Mercury Mountaineer, N/A, before 01/28/1998; SoundFX Direct Fit
• Fits 1997 Mercury Mountaineer, N/A; SoundFX Direct Fit

What This Muffler Helps Address

• Exhaust noise that has become louder than normal
• Corrosion-related muffler replacement needs
• Damaged or worn factory muffler assemblies
• Fitment issues when replacing the original exhaust muffler on listed Ford Explorer and Mercury Mountaineer models

Installation Notes

Verify the inlet offset, 3-bolt welded flange connection, and 2.25 in. outlet size before installation. For 1996-1998 Ford Explorer and 1997-1998 Mercury Mountaineer applications, confirm the build date note before 01/28/1998 where listed. If the vehicle uses a welded assembly, replace all required parts as noted in the fitment data. Part Number 18815 is a specific-fit muffler and should be matched to the original exhaust configuration.

Quality Assurance

Walker builds this muffler with 100% aluminized steel, mechanical interior joints, and spun-locked heads to support durability and a consistent fit. Part Number 18815 is engineered as a direct-fit replacement for the listed applications.