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Walker 18221 Exhaust Muffler
| Brand | Walker 18221 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 2.5 |
| Body Width | 9.75 |
| Inlet Quantity | 1 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 35 |
| 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 Outside Diameter | 2.25 |
| Outlet 1 Type | Pipe connection |
| Outlet Configuration | Center |
| Outlet Outside Diameter | 2.25 |
| Outlet Type | Pipe connection |
| Product line | SoundFX Direct Fit |
| Fits | Chevrolet and GMC · 14 vehicles |
Direct-fit design. Simplifies installation with a specific-fit exhaust muffler.
Aluminized steel. Helps extend service life versus low-carbon steel.
Mechanical interior joints. Spun-locked heads add durability for lasting performance.
Cross-references AP Exhaust 700020 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 18221
Walker SoundFX Direct Fit muffler 18221 is a specific-fit exhaust muffler for select Chevrolet S10 and GMC Sonoma applications from 1992-1994. It uses a 2.5-inch offset inlet and a 2.25-inch center outlet to match the listed exhaust configuration while supporting a clean, OE-style appearance.
The SoundFX Direct Fit line focuses on direct replacement fitment and controlled acoustics. For owners searching for a 1992-1994 Chevrolet S10 muffler or a 1992-1994 GMC Sonoma exhaust muffler, part number 18221 provides a vehicle-specific solution built around the original pipe layout.
- Specific-fit exhaust muffler for listed Chevrolet S10 and GMC Sonoma models
- Oval muffler shape with regular grade construction
- 100% aluminized steel body for improved service life versus low-carbon steel
- Mechanical interior joints and spun-locked heads for added durability
- 1 inlet / 1 outlet configuration
- 2.5-inch inlet inside diameter, 2.25-inch outlet outside diameter
- Offset inlet and center outlet layout
- Overall length: 35 inches; body length: 21 inches; body width: 9.75 inches; body height: 4.25 inches
Fitment Details
- Fits 1992-1994 Chevrolet S10, N/A; SoundFX Direct Fit. For welded assembly, replace all required parts.
- Fits 1992-1993 Chevrolet S10, N/A; without Syclone or HD Off Road Package; SoundFX Direct Fit. For welded assembly, replace all required parts.
- Fits 1992-1993 Chevrolet S10, N/A; without High Output; SoundFX Direct Fit. For welded assembly, replace all required parts.
- Fits 1992-1994 GMC Sonoma, N/A; SoundFX Direct Fit. For welded assembly, replace all required parts.
- Fits 1992-1993 GMC Sonoma, N/A; without Syclone or HD Off Road Package; SoundFX Direct Fit. For welded assembly, replace all required parts.
- Fits 1992-1993 GMC Sonoma, N/A; without High Output; SoundFX Direct Fit. For welded assembly, replace all required parts.
Key Features
- Walker SoundFX Direct Fit exhaust muffler
- Part number 18221
- Aluminized steel construction
- Offset inlet / center outlet configuration
- Oval body design for direct replacement packaging
What This Muffler Helps Address
- Exhaust noise from a worn or damaged muffler
- Rust-related muffler deterioration on aluminized or steel exhaust systems
- Fitment issues when replacing a vehicle-specific muffler on a Chevrolet S10 or GMC Sonoma
- Incorrect inlet and outlet alignment during exhaust repair
- Loss of OE-style exhaust routing after muffler replacement
Installation Notes
Confirm the existing exhaust layout before installation, including the 2.5-inch inlet and 2.25-inch outlet sizing, offset inlet position, and center outlet orientation. This muffler is not reversible and is not tunable. If the vehicle uses a welded assembly, replace all required parts to match the original system layout.
Walker SoundFX Direct Fit is a product line focused on direct replacement exhaust components with vehicle-specific fitment and controlled acoustics. Part number 18221 follows that approach for select 1992-1994 Chevrolet S10 and GMC Sonoma applications.
Quality Assurance
Walker builds this muffler with 100% aluminized steel, mechanical interior joints, and spun-locked heads to support durability and longer service life compared with low-carbon steel construction.
| Year | Make | Model | Drive Type | Liters | Cylinders | Wheel Base | Notes |
|---|---|---|---|---|---|---|---|
| 1994 | Chevrolet | S10 | RWD | 4.3L | V6 | 108.4" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1994 | GMC | Sonoma | RWD | 4.3L | V6 | 108.4" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1993 | Chevrolet | S10 | 4WD | 4.3L | V6 | — | without Syclone Or HD Off Road Package; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1993 | Chevrolet | S10 | RWD | 2.8L | V6 | 108.4" | without High Output; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1993 | Chevrolet | S10 | RWD | 4.3L | V6 | 108.4" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1993 | GMC | Sonoma | 4WD | 4.3L | V6 | — | without Syclone Or HD Off Road Package; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1993 | GMC | Sonoma | RWD | 4.3L | V6 | 108.4" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1993 | GMC | Sonoma | RWD | 2.8L | V6 | 108.4" | without High Output; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1992 | Chevrolet | S10 | 4WD | 4.3L | V6 | — | without Syclone Or HD Off Road Package; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1992 | Chevrolet | S10 | RWD | 2.8L | V6 | 108.4" | without High Output; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1992 | Chevrolet | S10 | RWD | 4.3L | V6 | 108.4" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1992 | GMC | Sonoma | 4WD | 4.3L | V6 | — | without Syclone Or HD Off Road Package; If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1992 | GMC | Sonoma | RWD | 4.3L | V6 | 108.4" | If welded assembly, replace all required parts; SoundFX Direct Fit |
| 1992 | GMC | Sonoma | RWD | 2.8L | V6 | 108.4" | without High Output; If welded assembly, replace all required parts; SoundFX Direct Fit |
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