MagnaFlow OEM-Grade Federal/EPA-compliant direct-fit catalytic converter (21-989) for the 2001-2006 Chevrolet Silverado 2500 HD 6.0L, also fits the GMC Sierra 2500 HD. Spun-body 409 stainless construction with mandrel-bent tubing and a single laser-fusion weld replicates the OE design for smooth flow and a leak-resistant seal; installs with the proper tools, no cutting or welding required. Includes gaskets. Meets Federal/EPA emissions standards for OBDII vehicles (not for sale in California).
| Type | Direct-fit catalytic converter |
| Grade | OEM Grade |
| Material | 409 stainless steel (spun body) |
| Hardware | Gaskets included |
| OEM Replacement | 15798955, 15070411 |
| Emissions | Federal/EPA compliant (not for CA) |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004 | Chevrolet | Silverado 2500 | Base |
| 2004 | Chevrolet | Silverado 2500 | LS |
| 2004 | Chevrolet | Silverado 2500 | LT |
| 2004 | Chevrolet | Silverado 2500 | WT |
| 2001-2005 | Chevrolet | Silverado 2500 HD | Base |
| 2001-2006 | Chevrolet | Silverado 2500 HD | LS |
| 2001-2006 | Chevrolet | Silverado 2500 HD | LT |
| 2003-2006 | Chevrolet | Silverado 2500 HD | WT |
| 2004 | GMC | Sierra 2500 | Base |
| 2004 | GMC | Sierra 2500 | SLE |
| 2004 | GMC | Sierra 2500 | SLT |
| 2004 | GMC | Sierra 2500 | WT |
| 2002-2005 | GMC | Sierra 2500 HD | Base |
| 2001-2002,2006 | GMC | Sierra 2500 HD | SL |
| 2001-2006 | GMC | Sierra 2500 HD | SLE |
| 2001-2006 | GMC | Sierra 2500 HD | SLT |
| 2003-2006 | GMC | Sierra 2500 HD | WT |
