MagnaFlow OEM-Grade Federal/EPA-compliant direct-fit catalytic converter (21-252) for the 2011-2019 Chevrolet Silverado 2500 HD (also fits 2011-2019 GMC Sierra 2500 HD). Spun-body 409 stainless construction with a single laser-fusion weld replicates the OE design for smooth flow and a leak-resistant seal; installs with no cutting or welding. Federal/EPA compliant (not for sale in California).
| Type | Direct-fit catalytic converter |
| Grade | OEM Grade |
| Material | 409 stainless steel (spun body) |
| Emissions | Federal/EPA compliant - not for sale in California |
Documents: Technical Bulletin (PDF) | Technical Bulletin (PDF) | Technical Bulletin (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2019 | Chevrolet | Silverado 2500 HD | High Country |
| 2011-2019 | Chevrolet | Silverado 2500 HD | LT |
| 2011-2019 | Chevrolet | Silverado 2500 HD | LTZ |
| 2011-2019 | Chevrolet | Silverado 2500 HD | WT |
| 2015-2019 | Chevrolet | Silverado 3500 HD | High Country |
| 2011-2019 | Chevrolet | Silverado 3500 HD | LT |
| 2011-2019 | Chevrolet | Silverado 3500 HD | LTZ |
| 2011-2019 | Chevrolet | Silverado 3500 HD | WT |
| 2017-2019 | Chevrolet | Suburban 3500 HD | LS |
| 2017-2019 | Chevrolet | Suburban 3500 HD | LT |
| 2015-2019 | GMC | Sierra 2500 HD | Base |
| 2011-2019 | GMC | Sierra 2500 HD | Denali |
| 2011-2019 | GMC | Sierra 2500 HD | SLE |
| 2011-2019 | GMC | Sierra 2500 HD | SLT |
| 2011-2014 | GMC | Sierra 2500 HD | WT |
| 2015-2019 | GMC | Sierra 3500 HD | Base |
| 2011-2019 | GMC | Sierra 3500 HD | Denali |
| 2011-2019 | GMC | Sierra 3500 HD | SLE |
| 2011-2019 | GMC | Sierra 3500 HD | SLT |
| 2011-2014 | GMC | Sierra 3500 HD | WT |
