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The MagnaFlow 49057 is a direct-fit catalytic converter for OBDII vehicles with Federal/EPA emissions systems. It bolts on with the included flange gasket, no cutting or welding, and interchanges with OE part 3W1Z-5E212-GB. Stainless steel construction and mandrel-bent tubing resist corrosion, and the single laser-fusion weld plus compact low-mass body cut leak risk and warm up faster. It is a stock-replacement part, not a performance upgrade, and it is not legal for California-registered vehicles.
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Owners of the 49057 mostly report a clean bolt-on fit and a check engine light that stays off after installation. Complaints center on the Federal-only emissions status and on converters that failed early when the engine had an underlying fault.
This direct-fit catalytic converter is a replacement part designed to meet or exceed Federal emissions requirements set by the EPA. It complies with legal standards for OBDII Federally registered vehicles with California or Federal/EPA emission systems.
It is built from corrosion-resistant stainless steel with free-flowing mandrel-bent tubing. A single laser fusion weld replicates the OE design and reduces the possibility of a leak. The compact, low-mass design allows for greater thermal efficiency.
The design was developed using 3D scanning so the part fits and functions like the original equipment. It can be installed with the proper tools, with no cutting or welding required.
