Walker 18971 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 SoundFX Direct Fit

Walker 18971 Exhaust Muffler

Brand Walker 18971
Muffler Type Reflection
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Inlet Inside Diameter 2
Body Width 8.81
Inlet Quantity 1
Outlet Inside Diameter 2
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 19
Body Height 4.25
Body Length 16
Body Material Steel
Finish Aluminized
Inlet 1 Inside Diameter 2
Inlet 1 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 2.625
Inlet Type Pipe connection
Outlet 1 Inside Diameter 2
Outlet 1 Type Pipe connection
Outlet Configuration Offset
Outlet Type Pipe connection
Product line SoundFX Direct Fit
Fits Ford · 8 vehicles

Direct-fit design. Installs as a specific-fit exhaust muffler with no modifications needed.

Aluminized steel. Helps resist corrosion for longer service life than low-carbon steel.

Mechanical interior joints. Spun-locked heads add durability and help maintain a quality appearance.

Cross-references AP Exhaust 700330 for the same application. See all 1.

$86.73Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
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Step 2 — Quantity
Order total $86.73
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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Walker SoundFX Direct Fit Muffler for Mustang

Walker SoundFX Direct Fit muffler Part Number 18971 is a specific-fit exhaust muffler for the 1998-2004 Ford Mustang. It uses an oval, reflection-style design with 2-inch inlet and outlet pipe connections to support a direct replacement on the listed application.

Key Features

  • Specific-fit exhaust muffler for 1998-2004 Ford Mustang
  • Oval steel body with aluminized finish for improved service life versus low-carbon steel
  • Reflection muffler type for controlled exhaust acoustics
  • Offset inlet and outlet configuration with 2-inch inside diameter connections
  • Mechanical interior joints and spun-locked heads for added durability
  • Walker SoundFX Direct Fit line for OE-style exhaust replacement

Product Details

Walker SoundFX Direct Fit Part Number 18971 is built for drivers replacing the factory muffler on a 1998-2004 Ford Mustang. The aluminized steel construction helps resist corrosion, while the oval body profile and offset pipe connection layout support a direct-fit installation on the specified vehicle application. This muffler is part of the Walker SoundFX Direct Fit product line, which focuses on replacement exhaust components that match the vehicle’s original fitment requirements and maintain a balanced exhaust note.

This part cross-references AP Exhaust 700330 for the same application.

What This Muffler Helps Address

  • Exhaust noise from a worn or damaged muffler
  • Rust or corrosion in the muffler body
  • Restricted exhaust flow caused by internal deterioration
  • Fitment issues when replacing the factory muffler on a Mustang exhaust system
  • Uneven exhaust tone after muffler failure

Installation Notes and Tips

Compatible With 1998-2004 Ford Mustang, N/A. If the exhaust uses a welded assembly, replace all required related parts during service to complete the repair correctly. Verify the inlet and outlet diameter, offset configuration, and overall muffler dimensions before installation to confirm alignment with the existing exhaust system.

Quality Assurance

Walker builds this muffler with 100% aluminized steel, mechanical interior joints, and spun-locked heads to support durability in exhaust service. Part Number 18971 is engineered as a direct-fit replacement for the listed Mustang application.

Related reading

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2004FordMustang3.9LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2004FordMustang3.8LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2003FordMustang3.8LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2002FordMustang3.8LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2001FordMustang3.8LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
2000FordMustang3.8LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1999FordMustang3.8LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1998FordMustang3.8LV6N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 700330