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Walker 14871 Catalytic Converter
| Brand | Walker 14871 |
|---|---|
| Clamps Included | Yes |
| Universal Or Specific Fit | Specific |
| Grade Type | Premium |
| Hangers Included | Yes |
| Body Shape | Round |
| Inlet Type | 3 bolt welded flange |
| Outlet Type | 2 bolt welded flange |
| Body Height | 6.000 |
| Body Length | 11.000 |
| Body Width | 6.000 |
| Inlet Quantity | 2 |
| Body Material | Stainless steel |
| Outlet Quantity | 1 |
| California Air Resources Board (CARB) Certified | No |
| Converter Quantity | 3 |
| Inlet Gasket Included | Yes |
| Inlet Mounting Hardware Included | No |
| Outlet Gasket Included | Yes |
| Outlet Mounting Hardware Included | Yes |
| Overall Length | 59.000 |
| Sensor Port Count | 4 |
| New York Certified | No |
| Oxygen Sensor Location | Pre and post converter |
| Inlet Type A | 3 bolt loose flange |
| Inlet Type B | 3 bolt loose flange |
| Mounting Hardware Included | Outlet only |
| NUMBER OF CONVERTER BODIES | 3 |
| O2 Sensor Ports | 4 |
| Type | Federal / epa direct-fit |
| Product line | EPA |
| Fits | Chevrolet and GMC · 16 vehicles |
EPA direct-fit. Built for specific Federal / EPA applications with precise exhaust connections.
Stainless steel body. Round converter housing with welded flange inlet and outlet construction.
Sensor-ready design. Includes four oxygen sensor ports for pre- and post-converter placement.
Cross-references AP Exhaust 645123, 280745 and 84653314 for the same application. See all 3.
EPA Direct-Fit Catalytic Converter
Walker Ultra Direct-Fit Catalytic Converter 14871 is a Federal / EPA direct-fit replacement built for specific applications on heavy-duty GM trucks. It is engineered for OBDII vehicles and uses a stainless steel body with welded flange connections for a precise exhaust fit.
Compatible With Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications from 2020-2023. The round body design, pre- and post-converter sensor ports, and included gaskets, clamps, hangers, and outlet mounting hardware support a complete exhaust repair on the specified platform.
- Federal / EPA direct-fit catalytic converter for specific applications
- Stainless steel body with round converter housing
- 3-bolt welded flange inlet and 2-bolt welded flange outlet
- 4 oxygen sensor ports with pre- and post-converter locations
- Includes inlet gasket, outlet gasket, clamps, hangers, and outlet mounting hardware
Fitment and Application Details
Fits 2020-2023 Chevrolet Silverado 2500 HD, N/A. Fits 2020-2023 Chevrolet Silverado 3500 HD, N/A. Fits 2020-2023 GMC Sierra 2500 HD, N/A. Fits 2020-2023 GMC Sierra 3500 HD, N/A. Part number 14871 is listed for EPA applications only and is not CARB certified.
This part cross-references AP Exhaust 645123 for the same application.
Common Repair Uses
- Replacing a restricted or damaged catalytic converter
- Restoring exhaust flow after converter failure
- Addressing emissions-related fault codes tied to converter efficiency
- Repairing flange, sensor-port, or exhaust sealing issues in the converter assembly
Installation Notes and Quality
Verify sensor-port count, flange style, and overall length before installation. The direct-fit layout is intended for the listed GM truck applications, and the included outlet-side hardware supports installation on the specified exhaust configuration. Part number 14871 is built to Walker Ultra Direct-Fit specifications for EPA-compliant applications.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Notes |
|---|---|---|---|---|---|---|
| 2023 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | GAS | EPA |
| 2023 | Chevrolet | Silverado 3500 HD | 6.6L | V8 | GAS | EPA |
| 2023 | GMC | Sierra 2500 HD | 6.6L | V8 | GAS | EPA |
| 2023 | GMC | Sierra 3500 HD | 6.6L | V8 | GAS | EPA |
| 2022 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | GAS | EPA |
| 2022 | Chevrolet | Silverado 3500 HD | 6.6L | V8 | GAS | EPA |
| 2022 | GMC | Sierra 2500 HD | 6.6L | V8 | GAS | EPA |
| 2022 | GMC | Sierra 3500 HD | 6.6L | V8 | GAS | EPA |
| 2021 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | GAS | EPA |
| 2021 | Chevrolet | Silverado 3500 HD | 6.6L | V8 | GAS | EPA |
| 2021 | GMC | Sierra 2500 HD | 6.6L | V8 | GAS | EPA |
| 2021 | GMC | Sierra 3500 HD | 6.6L | V8 | GAS | EPA |
| 2020 | Chevrolet | Silverado 2500 HD | 6.6L | V8 | GAS | EPA |
| 2020 | Chevrolet | Silverado 3500 HD | 6.6L | V8 | GAS | EPA |
| 2020 | GMC | Sierra 2500 HD | 6.6L | V8 | GAS | EPA |
| 2020 | GMC | Sierra 3500 HD | 6.6L | V8 | GAS | EPA |
| No rows match your filter. | ||||||