Walker 18581 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 SoundFX Direct Fit

Walker 18581 Exhaust Muffler

Brand Walker 18581
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Inlet Inside Diameter 2
Body Width 11
Inlet Quantity 1
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 27.625
Body Height 5.5
Body Length 16
Body Material Steel
Finish Aluminized
Inlet 1 Inside Diameter 2
Inlet 1 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 3.75
Inlet Type Pipe connection
Muffler Type Combination
Outlet 1 Outside Diameter 2
Outlet 1 Type Tip
Outlet Configuration Offset
Outlet Outside Diameter 2
Outlet Type Tip
Product line SoundFX Direct Fit
Fits Chevrolet · 12 vehicles

Direct-fit design. Installs as a specific-fit muffler with no guesswork.

Aluminized steel. Helps resist corrosion for longer service life.

Mechanical interior joints. Spun-locked heads add durability inside the muffler.

Cross-references AP Exhaust 700246 for the same application. See all 1.

$71.37Free 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.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $71.37
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Exhaust Muffler options

Walker SoundFX Direct Fit Muffler

Walker SoundFX Direct Fit muffler Part Number 18581 is a specific-fit exhaust muffler for select Chevrolet applications. It is built with aluminized steel for improved service life versus low-carbon steel and is shaped as an oval combination muffler with offset inlet and outlet connections.

Compatible with 1995-2001 Chevrolet Lumina and 1995-1999 Chevrolet Monte Carlo, this muffler is intended for drivers replacing a worn factory-style exhaust component while maintaining a clean appearance and controlled exhaust tone.

Key Features

  • Specific-fit exhaust muffler for direct replacement applications
  • Oval body shape with a combination muffler design
  • 100% aluminized steel construction for longer service life
  • Mechanical interior joints and spun-locked heads for added durability
  • Offset inlet and offset outlet configuration
  • 2-inch inlet and 2-inch outlet sizing
  • Walker SoundFX Direct Fit line for OE-style fit and acoustics

Product Details

Walker SoundFX Direct Fit Part Number 18581 is engineered for a precise exhaust replacement on select Chevrolet Lumina and Chevrolet Monte Carlo models. The aluminized steel body helps resist corrosion better than low-carbon steel, while the oval steel shell and internal construction support consistent exhaust flow and a factory-style appearance. The SoundFX Direct Fit product line focuses on direct-fit replacement mufflers with balanced acoustics and durable construction for everyday driving.

This part cross-references AP Exhaust 700246 for the same application.

Common Exhaust Issues It Can Address

  • Rusted or perforated muffler housing
  • Excessive exhaust noise from a failing muffler
  • Restricted exhaust flow caused by internal deterioration
  • Damaged factory-style muffler fitment on replacement jobs
  • Worn exhaust components on Chevrolet Lumina and Monte Carlo models

Installation Notes and Tips

  • Fits 1995-2001 Chevrolet Lumina, N/A
  • Fits 1995-1999 Chevrolet Monte Carlo, N/A
  • Verify inlet and outlet diameter, offset configuration, and overall length before installation
  • Confirm exhaust pipe alignment and hanger positioning during replacement
  • Professional exhaust installation is recommended for proper sealing and fit

Quality Assurance

Walker SoundFX Direct Fit mufflers are built with aluminized steel, mechanical interior joints, and spun-locked heads to support durability in exhaust service. Part Number 18581 is a direct-fit replacement option for select Chevrolet applications.

Related reading

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2001ChevroletLumina3.1LV6N/ASoundFX Direct Fit
2000ChevroletLumina3.1LV6N/ASoundFX Direct Fit
1999ChevroletLumina3.1LV6N/ASoundFX Direct Fit
1999ChevroletMonte Carlo3.1LV6N/ASoundFX Direct Fit
1998ChevroletLumina3.1LV6N/ASoundFX Direct Fit
1998ChevroletMonte Carlo3.1LV6N/ASoundFX Direct Fit
1997ChevroletLumina3.1LV6N/ASoundFX Direct Fit
1997ChevroletMonte Carlo3.1LV6N/ASoundFX Direct Fit
1996ChevroletLumina3.1LV6N/ASoundFX Direct Fit
1996ChevroletMonte Carlo3.1LV6N/ASoundFX Direct Fit
1995ChevroletLumina3.1LV6N/ASoundFX Direct Fit
1995ChevroletMonte Carlo3.1LV6N/ASoundFX 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 — 700246