Walker 18439 Exhaust Muffler
OE Quality 60-Day Returns
Walker
 SoundFX Direct Fit

Walker 18439 Exhaust Muffler

Brand Walker 18439
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 27.5
Body Height 5.5
Body Length 18
Body Material Steel
Finish Aluminized
Inlet 1 Inside Diameter 2
Inlet 1 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 3.5
Inlet Type Pipe connection
Muffler Type Combination
Outlet 1 Outside Diameter 1.75
Outlet 1 Type Tip
Outlet Configuration Center
Outlet Outside Diameter 1.75
Outlet Type Tip
Product line SoundFX Direct Fit
Fits Chevrolet and Pontiac · 31 vehicles

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

100% aluminized steel. Helps resist corrosion for longer service life than low-carbon steel.

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

Cross-references AP Exhaust 14711 and AP Exhaust 700185 for the same application. See all 2.

$63.29Free 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 $63.29
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 for Cavalier and Sunfire

Walker SoundFX Direct Fit muffler Part Number 18439 is a specific-fit exhaust muffler for select Chevrolet Cavalier and Pontiac Sunfire applications. It uses 100% aluminized steel for improved service life versus low-carbon steel and is built to deliver a clean appearance with controlled exhaust acoustics.

Key Features

  • Specific-fit replacement muffler for select 1995-2005 Chevrolet Cavalier and Pontiac Sunfire models
  • Oval muffler body with aluminized steel construction
  • Offset 2-inch inlet with center outlet tip configuration
  • Mechanical interior joints and spun-locked heads for added durability
  • Walker SoundFX Direct Fit line for OE-style exhaust replacement
  • Part Number 18439 for catalog and fitment lookup

Product Details

The Walker SoundFX Direct Fit line is built for drivers who need a direct replacement exhaust muffler with consistent fit and controlled sound. This muffler features an oval steel body, aluminized finish, 27.5-inch overall length, 11-inch body width, and 5.5-inch body height. The inlet uses a 2-inch pipe connection with an offset configuration, while the outlet is a 1.75-inch center tip. For shoppers searching for a Chevrolet Cavalier muffler replacement or Pontiac Sunfire exhaust muffler, Part Number 18439 matches the listed vehicle applications and supports a straightforward OE-style repair.

This part cross-references AP Exhaust 14711 and 700185 for the same application.

Common Repair Uses

  • Restoring a damaged or rusted muffler on a 1995-2005 Chevrolet Cavalier
  • Replacing a worn exhaust muffler on a 1999-2005 Pontiac Sunfire
  • Addressing exhaust noise from a failing internal muffler core
  • Replacing a corroded aluminized or steel muffler assembly
  • Returning the exhaust system to a factory-style outlet layout

Installation Notes

  • Fits 1999-2005 Chevrolet Cavalier, N/A, with Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts
  • Fits 1999-2005 Pontiac Sunfire, N/A, with Single Outlet; Requires 36153 Or 36360; If welded assembly, replace all required parts
  • Fits 1999-2001 Pontiac Sunfire, N/A, with Single Outlet; Requires 36153 Or 36360
  • Fits 1995-1998 Chevrolet Cavalier, N/A; If welded assembly, replace all required parts
  • Fits 1996-1998 Chevrolet Cavalier, N/A; Requires 36153; If welded assembly, replace all required parts

Verify inlet and outlet configuration, hanger style, and any welded assembly requirements before installation. This muffler is not reversible or tunable, so the listed orientation should be matched to the vehicle exhaust layout during replacement.

Quality Assurance

Walker SoundFX mufflers are engineered with aluminized steel, mechanical interior joints, and spun-locked heads to support durability in everyday exhaust service. The direct-fit design is intended to provide a consistent replacement solution for Chevrolet Cavalier and Pontiac Sunfire exhaust repairs.

Related reading

This part fits 31 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypeLitersCylindersPositionNotes
2005ChevroletCavalier—2.2LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2005PontiacSunfire—2.2LL4N/Awith Single Outlet; Requires 36153 Or 36360; If welded assembly, replace all required parts; SoundFX Direct Fit
2004ChevroletCavalier—2.2LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2004PontiacSunfire—2.2LL4N/Awith Single Outlet; Requires 36153 Or 36360; If welded assembly, replace all required parts; SoundFX Direct Fit
2003ChevroletCavalier—2.2LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2003PontiacSunfire—2.2LL4N/Awith Single Outlet; Requires 36153 Or 36360; If welded assembly, replace all required parts; SoundFX Direct Fit
2002ChevroletCavalier—2.2LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2002ChevroletCavalier—2.4LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2002PontiacSunfire—2.2LL4N/Awith Single Outlet; Requires 36153 Or 36360; If welded assembly, replace all required parts; SoundFX Direct Fit
2001ChevroletCavalier—2.2LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2001ChevroletCavalier—2.4LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2001PontiacSunfire—2.2LL4N/Awith Single Outlet; Requires 36153 Or 36360; If welded assembly, replace all required parts; SoundFX Direct Fit
2001PontiacSunfire—2.4LL4N/Awith Single Outlet; Requires 36153 Or 36360; SoundFX Direct Fit
2000ChevroletCavalier—2.2LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2000ChevroletCavalier—2.4LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
2000PontiacSunfire—2.2LL4N/Awith Single Outlet; Requires 36153 Or 36360; If welded assembly, replace all required parts; SoundFX Direct Fit
2000PontiacSunfire—2.4LL4N/Awith Single Outlet; Requires 36153 Or 36360; SoundFX Direct Fit
1999ChevroletCavalier—2.2LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
1999ChevroletCavalier—2.4LL4N/Awith Single Outlet; Requires 36153 With Flat/Spade Type Or 36360 With Rod Type; If welded assembly, replace all required parts; SoundFX Direct Fit
1999PontiacSunfire—2.2LL4N/Awith Single Outlet; Requires 36153 Or 36360; If welded assembly, replace all required parts; SoundFX Direct Fit
1999PontiacSunfire—2.4LL4N/Awith Single Outlet; Requires 36153 Or 36360; SoundFX Direct Fit
1998ChevroletCavalier—2.2LL4N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1998ChevroletCavalierConvertible2.4LL4N/ARequires 36153; If welded assembly, replace all required parts; SoundFX Direct Fit
1998ChevroletCavalierSedan2.4LL4N/ARequires 36153; If welded assembly, replace all required parts; SoundFX Direct Fit
1997ChevroletCavalier—2.2LL4N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1997ChevroletCavalierConvertible2.4LL4N/ARequires 36153; If welded assembly, replace all required parts; SoundFX Direct Fit
1997ChevroletCavalierSedan2.4LL4N/ARequires 36153; If welded assembly, replace all required parts; SoundFX Direct Fit
1996ChevroletCavalier—2.2LL4N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1996ChevroletCavalierConvertible2.4LL4N/ARequires 36153; If welded assembly, replace all required parts; SoundFX Direct Fit
1996ChevroletCavalierSedan2.4LL4N/ARequires 36153; If welded assembly, replace all required parts; SoundFX Direct Fit
1995ChevroletCavalier—2.2LL4N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 14711AP Exhaust — 700185