MagnaFlow OEM Grade universal catalytic converter (60021) for GMC Sierra 2500 HD / Chevrolet (2001-2006). It has a 4in inlet and outlet. Stainless steel construction with a ceramic substrate for corrosion resistance and long service life. Federal/EPA compliant (not CARB; not legal in CA, CO or NY). Universal design — cutting and welding required to install.
| Type | Universal catalytic converter (OEM Grade) |
| Compliance | Federal/EPA compliant (not CARB; not legal in CA, CO or NY) |
| Material | Stainless steel, ceramic substrate |
| Inlet / Outlet | 4in / 4in |
| Connection | Pipe / weld-on (universal) |
| Quantity | 1 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2001-2004 | Chevrolet | Silverado 2500 HD | Base |
| 2001-2004,2006 | Chevrolet | Silverado 2500 HD | LS |
| 2001-2004,2006 | Chevrolet | Silverado 2500 HD | LT |
| 2004,2006 | Chevrolet | Silverado 2500 HD | WT |
| 2001-2004 | Chevrolet | Silverado 3500 | Base |
| 2001-2004,2006 | Chevrolet | Silverado 3500 | LS |
| 2001-2004,2006 | Chevrolet | Silverado 3500 | LT |
| 2004,2006 | Chevrolet | Silverado 3500 | WT |
| 2002-2004 | GMC | Sierra 2500 HD | Base |
| 2001-2002,2006 | GMC | Sierra 2500 HD | SL |
| 2001-2004,2006 | GMC | Sierra 2500 HD | SLE |
| 2001-2004,2006 | GMC | Sierra 2500 HD | SLT |
| 2003-2004,2006 | GMC | Sierra 2500 HD | WT |
| 2002-2004 | GMC | Sierra 3500 | Base |
| 2001-2002,2006 | GMC | Sierra 3500 | SL |
| 2001-2004,2006 | GMC | Sierra 3500 | SLE |
| 2001-2004,2006 | GMC | Sierra 3500 | SLT |
| 2004,2006 | GMC | Sierra 3500 | WT |
