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This is a bolt-on rear catalytic converter for 2006-2013 BMW 3 Series cars with the naturally aspirated six-cylinder engine. It copies the factory spun-body shape, so it installs with hand tools and no cutting or welding, and MagnaFlow includes the gaskets and hardware. The stainless steel body and single laser-fusion weld are built to resist corrosion and leaks. It meets Federal EPA emissions rules, not California's stricter standard, so check your state before buying. Against generic universal converters, the direct fit and included hardware save install time; against OE parts, it is a lower-cost replacement that owners say fits and quiets the check engine light.
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Owners of 328i models report the converter bolts up like the factory part and clears the check engine light. Most praise the fit and included hardware; a few note that rusted original bolts make the job harder than expected.
This is a MagnaFlow OEM-grade, direct-fit catalytic converter, part number 49763, for the rear position on select BMW models. It is built to meet or exceed Federal EPA emissions requirements. It is designed for OBDII Federally registered vehicles with California or Federal/EPA emission systems.
It has a stainless steel spun body that replicates the original equipment design. A single laser fusion weld reduces the chance of a leak. The compact, low-mass design allows greater thermal efficiency, and the tubing is free-flowing and mandrel-bent. The fit was developed using 3D scanning so the part fits and functions like the original.
It bolts in with the proper tools, and no cutting or welding is required. Gaskets and hardware are included, so corroded factory parts don't need to be reused.
