Walker 18387 Exhaust Muffler - Front
OE Quality 60-Day Returns
Walker
 SoundFX Direct Fit

Walker 18387 Exhaust Muffler - Front

Brand Walker 18387
Position Front
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Inlet Inside Diameter 2.25
Body Width 9.75
Inlet Quantity 1
Outlet Inside Diameter 2.25
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 23
Body Height 4.25
Body Length 19
Body Material Steel
Finish Aluminized
Inlet 1 Inside Diameter 2.25
Inlet 1 Type Pipe connection
Inlet Configuration Center
Inlet Type Pipe connection
Muffler Type Combination
Outlet 1 Inside Diameter 2.25
Outlet 1 Type Pipe connection
Outlet Configuration Offset
Outlet Type Pipe connection
Product line SoundFX Direct Fit
Fits Buick, Cadillac, Jeep, and Oldsmobile · 83 vehicles

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

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 Anchor 3032, Anchor 3034 and AP Exhaust 700045 for the same application. See all 4.

$69.05Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
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Step 2 — Quantity
Order total $69.05
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 OE-Style Replacement

Walker SoundFX Direct Fit muffler Part Number 18387 is a specific-fit exhaust muffler built for select Jeep, Buick, Cadillac, and Oldsmobile applications. It combines an aluminized steel finish with a direct-fit layout to support a clean replacement on vehicles such as the Jeep Cherokee, Jeep Comanche, and Buick Riviera.

Key Features

  • Specific-fit exhaust muffler for direct replacement applications
  • Oval combination muffler design
  • 100% aluminized steel construction for improved service life versus low-carbon steel
  • Steel body with aluminized finish
  • Center inlet and offset outlet pipe connection layout
  • 2.25-inch inlet and 2.25-inch outlet inside diameter
  • Overall length: 23 inches; body length: 19 inches; body width: 9.75 inches; body height: 4.25 inches
  • Mechanical interior joints and spun-locked heads for added durability

Product Details

Walker SoundFX Direct Fit muffler Part Number 18387 is engineered for vehicles that require a specific replacement muffler with a center inlet and offset outlet configuration. The oval, combination-style body is sized for select front and rear exhaust applications, including 1986-1989 Jeep Cherokee, 1987-1989 Jeep Comanche, 1986-1987 Jeep Wagoneer, 1979-1985 Buick Riviera, 1981-1985 Cadillac Eldorado, 1981-1985 Cadillac Seville, and 1979-1985 Oldsmobile Toronado. This part cross-references AP Exhaust 700045 for the same application.

Common Uses

  • Replacing a rusted or corroded muffler
  • Restoring exhaust flow after a damaged factory muffler
  • Addressing exhaust noise from a failing muffler body or internal baffles
  • Replacing a welded-in muffler during exhaust system repair
  • Returning the exhaust system to a direct-fit configuration on supported Jeep, Buick, Cadillac, and Oldsmobile models

Installation Notes and Tips

Verify inlet and outlet orientation before installation: this muffler uses a 2.25-inch center inlet and 2.25-inch offset outlet. Fitment includes notes for certain vehicles, such as welded assemblies requiring replacement of all required parts and 1987-1989 Jeep Comanche applications with catalytic converter. Confirm the vehicle’s exhaust routing, position, and emissions configuration before ordering. Fits 1986-1989 Jeep Cherokee, N/A; Fits 1987-1989 Jeep Comanche, N/A; Fits 1986-1987 Jeep Wagoneer, N/A; Fits 1979-1985 Buick Riviera, Front; Fits 1982-1985 Buick Riviera, N/A; Fits 1981-1985 Cadillac Eldorado, Front; Fits 1981-1985 Cadillac Seville, N/A; Fits 1979-1985 Oldsmobile Toronado, N/A; Fits 1981 Buick Riviera, Front; Fits 1981 Cadillac Eldorado, Front; Fits 1981 Cadillac Seville, N/A; Fits 1981 Oldsmobile Toronado, N/A.

Quality Assurance

Walker SoundFX Direct Fit mufflers use aluminized steel, mechanical interior joints, and spun-locked heads to support durability and a quality appearance in service. The SoundFX Direct Fit line is built for OE-style replacement needs where correct fitment and dependable construction matter.

Related reading

This part fits 83 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
1989JeepCherokeeSport2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1989JeepCherokeeLaredo2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1989JeepCherokeeBase2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1989JeepCherokeePioneer2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1989JeepComanche—4.0LL6—N/Awith Catalytic Converter; SoundFX Direct Fit
1988JeepCherokeeLaredo2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1988JeepCherokeeBase2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1988JeepCherokeeChief2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1988JeepCherokeePioneer2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1988JeepComanche—4.0LL6—N/Awith Catalytic Converter; SoundFX Direct Fit
1987JeepCherokeeLaredo2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1987JeepCherokeeBase2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1987JeepCherokeeChief2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1987JeepCherokeePioneer2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1987JeepComanche—4.0LL6—N/Awith Catalytic Converter; SoundFX Direct Fit
1987JeepWagoneer—2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1986JeepCherokee—2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1986JeepWagoneer—2.5LL4—N/AIf welded assembly, replace all required parts; SoundFX Direct Fit
1985BuickRiviera—5.0LV8—FrontSoundFX Direct Fit
1985BuickRiviera—5.7LV8—N/ASoundFX Direct Fit
1985BuickRiviera—3.8LV6—FrontSoundFX Direct Fit
1985CadillacEldoradoCabriolet5.7LV8—FrontSoundFX Direct Fit
1985CadillacEldoradoBase5.7LV8—FrontSoundFX Direct Fit
1985CadillacEldoradoTouring5.7LV8—FrontSoundFX Direct Fit
1985CadillacSeville—5.7LV8—N/ASoundFX Direct Fit
1985OldsmobileToronado—5.0LV8—N/ASoundFX Direct Fit
1985OldsmobileToronado—5.7LV8—N/ASoundFX Direct Fit
1984BuickRiviera—5.0LV8—FrontSoundFX Direct Fit
1984BuickRiviera—5.7LV8—N/ASoundFX Direct Fit
1984BuickRiviera—3.8LV6—FrontSoundFX Direct Fit
1984BuickRivieraBase4.1LV6—FrontSoundFX Direct Fit
1984BuickRivieraLuxury4.1LV6—FrontSoundFX Direct Fit
1984CadillacEldoradoCabriolet5.7LV8—FrontSoundFX Direct Fit
1984CadillacEldoradoBase5.7LV8—FrontSoundFX Direct Fit
1984CadillacEldoradoTouring5.7LV8—FrontSoundFX Direct Fit
1984CadillacSeville—5.7LV8—N/ASoundFX Direct Fit
1984OldsmobileToronado—5.0LV8—N/ASoundFX Direct Fit
1984OldsmobileToronado—5.7LV8—N/ASoundFX Direct Fit
1984OldsmobileToronado—4.1LV6—N/ASoundFX Direct Fit
1983BuickRiviera—5.7LV8—N/ASoundFX Direct Fit
1983BuickRiviera—3.8LV6—FrontSoundFX Direct Fit
1983BuickRivieraBase5.0LV8—FrontSoundFX Direct Fit
1983BuickRivieraBase4.1LV6—FrontSoundFX Direct Fit
1983BuickRivieraXX Anniversary Edition5.0LV8—FrontSoundFX Direct Fit
1983BuickRivieraLuxury4.1LV6—FrontSoundFX Direct Fit
1983BuickRivieraLuxury5.0LV8—FrontSoundFX Direct Fit
1983BuickRivieraXX Anniversary Edition4.1LV6—FrontSoundFX Direct Fit
1983CadillacEldorado—5.7LV8—FrontSoundFX Direct Fit
1983CadillacSeville—5.7LV8—N/ASoundFX Direct Fit
1983OldsmobileToronado—5.0LV8—N/ASoundFX Direct Fit
1983OldsmobileToronado—5.7LV8—N/ASoundFX Direct Fit
1983OldsmobileToronado—4.1LV6—N/ASoundFX Direct Fit
1982BuickRiviera—5.7LV8—N/ASoundFX Direct Fit
1982BuickRiviera—3.8LV6—FrontSoundFX Direct Fit
1982BuickRivieraBase5.0LV8—FrontSoundFX Direct Fit
1982BuickRivieraBase4.1LV6—FrontSoundFX Direct Fit
1982BuickRivieraLimited Edition5.0LV8—FrontSoundFX Direct Fit
1982BuickRivieraLimited Edition4.1LV6—FrontSoundFX Direct Fit
1982CadillacEldorado—4.1LV6—FrontSoundFX Direct Fit
1982CadillacEldorado—5.7LV8—FrontSoundFX Direct Fit
1982CadillacSeville—5.7LV8—N/ASoundFX Direct Fit
1982CadillacSeville—4.1LV6—N/ASoundFX Direct Fit
1982OldsmobileToronado—5.0LV8—N/ASoundFX Direct Fit
1982OldsmobileToronado—5.7LV8—N/ASoundFX Direct Fit
1982OldsmobileToronado—4.1LV6—N/ASoundFX Direct Fit
1981BuickRiviera—3.8LV6—FrontSoundFX Direct Fit
1981BuickRiviera—5.0LV8—FrontSoundFX Direct Fit
1981BuickRiviera—5.7LV8—Frontwithout California Emission System; SoundFX Direct Fit
1981BuickRiviera—4.1LV6—FrontSoundFX Direct Fit
1981CadillacEldorado—5.7LV8—Frontwithout California Emission System; SoundFX Direct Fit
1981CadillacEldorado—4.1LV6—FrontSoundFX Direct Fit
1981CadillacSeville—5.7LV8—N/Awithout California Emission System; SoundFX Direct Fit
1981CadillacSeville—4.1LV6—N/ASoundFX Direct Fit
1981OldsmobileToronado—5.0LV8—N/ASoundFX Direct Fit
1981OldsmobileToronado—5.7LV8—N/Awithout California Emission System; SoundFX Direct Fit
1981OldsmobileToronadoBrougham4.1LV6—N/ASoundFX Direct Fit
1980BuickRiviera—5.7LV8GASFrontSoundFX Direct Fit
1980BuickRiviera—3.8LV6—FrontSoundFX Direct Fit
1980OldsmobileToronado—5.7LV8GASN/ASoundFX Direct Fit
1980OldsmobileToronado—5.0LV8GASN/ASoundFX Direct Fit
1979BuickRiviera—3.8LV6—FrontSoundFX Direct Fit
1979BuickRiviera—5.7LV8—FrontSoundFX Direct Fit
1979OldsmobileToronado—5.7LV8GASN/ASoundFX Direct Fit
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Anchor — 3032Anchor — 3034AP Exhaust — 700045Federal Parts — 6541