MagnaFlow Conv Direct Fit 11-16 Chevrolet Silverado 2500HD/3500HD / GMC Sierra 2500HD/3500HD

MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-252 helps keep the check engine light off. DIY installation is easy with the proper tools (no cutting or welding required). With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment.This direct-fit catalytic converter is designed to fit the 2011-2016 Chevrolet Silverado 2500 HD, 2011-2016 GMC Sierra 2500 HD, and additional vehicles. Hardware is included to eliminate the hassle of working with corroded factory parts. 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.
Technical Bulletin


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