Walker 18451 Exhaust Muffler
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Walker
 SoundFX Direct Fit

Walker 18451 Exhaust Muffler

Brand Walker 18451
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Body Width 11
Inlet Quantity 1
Outlet Inside Diameter 2.25
Outlet Quantity 1
Reversible No
Tunable No
Overall Length 32.5
Body Height 5.5
Body Length 27
Body Material Steel
Finish Aluminized
Inlet 1 Type 3 bolt welded flange
Inlet Configuration Offset
Inlet Offset 3.5
Inlet Type 3 bolt welded flange
Muffler Type Combination
Outlet 1 Inside Diameter 2.25
Outlet 1 Type Pipe connection
Outlet Configuration Center
Outlet Type Pipe connection
Product line SoundFX Direct Fit
Fits Chevrolet, GMC, and Oldsmobile · 14 vehicles

Direct-fit design. Installs as a specific replacement with a straightforward fit.

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

Oval combination muffler. Delivers quality appearance with favorable acoustics.

Cross-references AP Exhaust 700150 for the same application. See all 1.

$85.32Free 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 $85.32
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 Overview

Walker SoundFX Direct Fit muffler Part Number 18451 is a specific-fit exhaust muffler built for select Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada applications from 1995-1999. It uses 100% aluminized steel construction for improved service life versus low-carbon steel and is shaped as an oval combination muffler for a direct replacement layout.

The SoundFX Direct Fit line focuses on OE-style fitment, controlled exhaust tone, and a clean appearance. This Walker 18451 muffler features a 3-bolt welded flange inlet, center pipe connection outlet, and mechanical interior joints with spun-locked heads for added durability in everyday driving conditions.

Key Features

  • Specific-fit exhaust muffler for select 1995-1999 Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada models
  • Walker SoundFX Direct Fit design for OE-style replacement fitment
  • 100% aluminized steel body and finish for corrosion resistance compared with low-carbon steel
  • Oval combination muffler construction with a 32.5-inch overall length
  • 3-bolt welded flange inlet with offset inlet configuration
  • 2.25-inch outlet inside diameter with center outlet configuration
  • Mechanical interior joints and spun-locked heads for structural durability

Product Details

Walker 18451 is a direct-fit exhaust muffler engineered around the factory-style exhaust layout used on select GM SUVs. The oval steel body measures 27 inches long, 11 inches wide, and 5.5 inches high, with a 3.5-inch inlet offset and a 2.25-inch outlet. This part cross-references AP Exhaust 700150 for the same application. If you are replacing a worn muffler on a 1995-1999 Chevrolet Blazer, 1995-1999 GMC Jimmy, or 1996-1999 Oldsmobile Bravada, this part number 18451 is built to match the specified exhaust configuration.

The Walker SoundFX Direct Fit product line is aimed at replacement buyers who want a muffler that follows the original routing and connection style without requiring a universal fabrication approach. For shoppers searching for a 1995-1999 Chevrolet Blazer muffler replacement, a GMC Jimmy exhaust muffler, or an Oldsmobile Bravada direct-fit muffler, Walker 18451 provides a vehicle-specific solution.

Common Problems This Muffler Can Address

  • Exhaust noise from a rusted, cracked, or internally damaged muffler
  • Corrosion-related failure in the original steel muffler body
  • Poor fitment from a previous universal muffler installation
  • Exhaust leaks at the muffler connection points
  • Loss of factory-style exhaust routing on the specified GM SUV applications

Installation Notes and Tips

Fits 1995-1999 Chevrolet Blazer, N/A; Requires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit. Fits 1995-1999 GMC Jimmy, N/A; Requires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit. Fits 1996-1999 Oldsmobile Bravada, N/A; Requires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit.

Verify the inlet flange style, outlet diameter, and exhaust routing before installation. Because this is a specific-fit muffler, confirm the vehicle’s existing exhaust configuration and replace any related welded assembly components required for the application. The muffler is not reversible or tunable.

Quality Assurance

Walker uses aluminized steel construction, mechanical interior joints, and spun-locked heads to support durability and consistent fit. The SoundFX Direct Fit line is designed to deliver a clean replacement appearance and controlled acoustics for the listed vehicle applications.

Related reading

This part fits 14 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModel# DoorsLitersCylindersPositionNotes
1999ChevroletBlazer4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1999GMCJimmy4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1999OldsmobileBravada—4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1998ChevroletBlazer4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1998GMCJimmy4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1998OldsmobileBravada—4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1997ChevroletBlazer4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1997GMCJimmy4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1997OldsmobileBravada—4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1996ChevroletBlazer4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1996GMCJimmy4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1996OldsmobileBravada—4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1995ChevroletBlazer4 Door4.3LV6N/ARequires 36163; If welded assembly, replace all required parts; SoundFX Direct Fit
1995GMCJimmy4 Door4.3LV6N/ARequires 36163; If 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 — 700150