MagnaFlow 49789 - Catalytic Converter Fits select: 2004-2005 BMW 645, 2004-2005 BMW 745

OEM Grade Stainless Steel Exhaust Manifold with Integrated Catalytic Converter (49789) by MagnaFlow. Position: Driver Side. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 2.5". Color: Silver. Header Coating: Uncoated. If your car needs replacement, install one that will get you through the smog check. This converter is part of the exhaust header/manifold assembly, and it will directly replace the factory unit, with little or no fabrication required. The Direct Fit Catalytic Converter with Header is available in Pre-OBD II and OBD II configurations. MagnaFlow specializes in superior catalytic converter and exhaust technology and has spent the past 30+ years earning its reputation as a global market leader. American engineered and manufactured, MagnaFlow Catalytic Converters combine efficient industrial design to produce a product that exceeds, rather than meets, the highest standards of product performance and efficiency in the industry. MagnaFlow uses Ceramic substrates wit. EO# D-193-137 EO# D-193-137