Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 5551252. 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. This direct-fit catalytic converter is designed to fit the 2011 Chevrolet Silverado 2500 HD, 2011 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 California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
Technical Bulletin


This Part Fits:

Year	Make	Model	Submodel
2011	Chevrolet	Silverado 2500 HD	LT
2011	Chevrolet	Silverado 2500 HD	LTZ
2011	Chevrolet	Silverado 2500 HD	WT
2011	Chevrolet	Silverado 3500 HD	LT
2011	Chevrolet	Silverado 3500 HD	LTZ
2011	Chevrolet	Silverado 3500 HD	WT
2011	GMC	Sierra 2500 HD	Denali
2011	GMC	Sierra 2500 HD	SLE
2011	GMC	Sierra 2500 HD	SLT
2011	GMC	Sierra 2500 HD	WT
2011	GMC	Sierra 3500 HD	Denali
2011	GMC	Sierra 3500 HD	SLE
2011	GMC	Sierra 3500 HD	SLT
2011	GMC	Sierra 3500 HD	WT