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Walker 18831 Exhaust Muffler
| Brand | Walker 18831 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 2.5 |
| Body Width | 9.75 |
| Inlet Quantity | 1 |
| Outlet Inside Diameter | 2.25 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 24 |
| Body Height | 4.25 |
| Body Length | 21 |
| Body Material | Steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 2.5 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 2.875 |
| 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, and Oldsmobile · 19 vehicles |
Direct-fit replacement. Specific-fit muffler installs cleanly 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 finish.
Cross-references TYC 700360 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker SoundFX Direct Fit Muffler for OE-Style Replacement
Walker SoundFX Direct Fit muffler Part Number 18831 is a specific-fit exhaust muffler built for select Cadillac, Buick, and Oldsmobile applications. It uses aluminized steel construction and a direct-fit layout to support a clean replacement on vehicles such as the Cadillac Eldorado, Cadillac Seville, and Buick Riviera.
Key Features
- Specific-fit exhaust muffler for direct replacement applications
- Oval body shape with a 24-inch overall length
- 2.5-inch inlet and 2.25-inch outlet with pipe connection ends
- Offset inlet and offset outlet configuration
- Aluminized steel body and finish for improved service life versus low-carbon steel
- 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 18831 is engineered as a combination muffler with a 9.75-inch body width, 4.25-inch body height, and 21-inch body length. The aluminized steel construction helps resist corrosion in everyday exhaust service, while the direct-fit design supports a cleaner installation on the listed vehicle applications. This muffler is a practical choice for restoring exhaust function and maintaining a controlled exhaust note on compatible Cadillac Eldorado, Cadillac Seville, Cadillac DeVille, Cadillac Fleetwood, Cadillac Commercial Chassis, Buick Riviera, and Oldsmobile Toronado models.
The SoundFX Direct Fit product line focuses on replacement mufflers that match the vehicle’s original exhaust layout more closely than universal parts. For shoppers searching for a Walker muffler 18831, or a direct-fit exhaust muffler for 1988-1993 Cadillac Eldorado and 1991-1993 Buick Riviera applications, this part provides the dimensions and connection style needed for those specific platforms. This part cross-references TYC 700360 for the same application.
Common Exhaust Issues This Muffler Can Address
- Rust-through or corrosion in the original muffler body
- Exhaust noise caused by a damaged internal muffler structure
- Restricted exhaust flow from a deteriorated muffler assembly
- Fitment problems from using a universal muffler in an OE-style system
- Replacement needs on welded exhaust assemblies where direct-fit dimensions matter
Installation Notes and Fitment
- Fits 1991-1993 Buick Riviera, N/A; if welded assembly, modifications and/or additional parts may be required.
- Fits 1992 Cadillac Eldorado, N/A; with Single Outlet; if welded assembly, modifications and/or additional parts may be required.
- Fits 1991-1992 Oldsmobile Toronado, N/A; if welded assembly, replace all required parts.
- Fits 1988-1991 Cadillac Eldorado, N/A; if welded assembly, replace all required parts.
- Fits 1988-1991 Cadillac Seville, N/A; if welded assembly, modifications and/or additional parts may be required.
- Fits 1988 Cadillac Commercial Chassis, N/A; if welded assembly, replace all required parts.
- Fits 1988 Cadillac DeVille, N/A; if welded assembly, replace all required parts.
- Fits 1988 Cadillac Fleetwood, N/A; if welded assembly, replace all required parts.
Verify inlet and outlet sizing, offset placement, and overall muffler dimensions before installation. Because some listed applications use welded assemblies, the exhaust system may require additional parts or section replacement to complete the repair.
Quality Assurance
Walker builds SoundFX mufflers with 100% aluminized steel, mechanical interior joints, and spun-locked heads to support durability in exhaust service. Part Number 18831 is made for specific vehicle applications and follows the SoundFX Direct Fit format for OE-style replacement work.
| Year | Make | Model | Submodel | Drive Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 1993 | Buick | Riviera | — | — | 3.8L | V6 | N/A | If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit |
| 1992 | Buick | Riviera | — | — | 3.8L | V6 | N/A | If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit |
| 1992 | Cadillac | Eldorado | — | — | 4.9L | V8 | N/A | with Single Outlet; If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit |
| 1992 | Oldsmobile | Toronado | Base | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1991 | Buick | Riviera | — | — | 3.8L | V6 | N/A | If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit |
| 1991 | Cadillac | Eldorado | — | — | 4.9L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1991 | Cadillac | Seville | — | — | 4.9L | V8 | N/A | If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit |
| 1991 | Oldsmobile | Toronado | Base | — | 3.8L | V6 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1990 | Cadillac | Eldorado | — | — | 4.5L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1990 | Cadillac | Seville | — | — | 4.5L | V8 | N/A | If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit |
| 1989 | Cadillac | Eldorado | — | — | 4.5L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1989 | Cadillac | Seville | — | — | 4.5L | V8 | N/A | If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit |
| 1988 | Cadillac | Commercial Chassis | — | FWD | 4.5L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1988 | Cadillac | DeVille | — | FWD | 4.5L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1988 | Cadillac | Eldorado | — | — | 4.5L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1988 | Cadillac | Fleetwood | Base | FWD | 4.5L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1988 | Cadillac | Fleetwood | d'Elegance | FWD | 4.5L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1988 | Cadillac | Fleetwood | 60 Special | FWD | 4.5L | V8 | N/A | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1988 | Cadillac | Seville | — | — | 4.5L | V8 | N/A | If welded assembly, modifications and/or additional parts may be required.; SoundFX Direct Fit |
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