Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 5551209. The Universal design allows the part to fit a wide array of vehicles (cutting and welding required), and the stainless steel construction of this spun body catalytic converter is highly resistant to corrosion. The single laser fusion weld of the spun body greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. 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.

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