Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-989. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. Designed to fit the 2001-2006 Chevrolet Silverado 2500 HD, 2001-2006 GMC Sierra 2500 HD, and more, this direct-fit catalytic converter also interchanges with OE parts 15798955 and 15070411, among others. Avoid potential exhaust leaks by using the included gaskets to get a proper seal. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.
Installation Instructions


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