MagnaFlow Conv DF BMW 99-03 540I 4.4L / 99-01 740I 4.4L California - D/S

When it's time to replace the catalytic converter on your 1999-2003 BMW 540i or 1999-2001 740i/iL, this direct-fit unit from Magnaflow is built to meet strict California emissions standards. You'll receive the converter itself, along with the necessary gaskets and hardware to complete the installation without needing to reuse old, corroded parts. This is crucial for ensuring a leak-free seal and proper function, especially in emissions-sensitive areas.

Magnaflow constructs this converter using corrosion-resistant stainless steel tubing and a spun body design, similar to the original equipment. The free-flowing, mandrel-bent tubing helps maintain exhaust flow dynamics, which is important for engine performance and fuel efficiency. A single laser fusion weld is used to join the components, significantly reducing the chance of exhaust leaks. The compact, low-mass design also contributes to better thermal efficiency, helping the converter reach its optimal operating temperature quickly. Magnaflow uses advanced 3D scanning during their research and development to ensure this converter fits and functions just like the factory part.

This converter is specifically designed to comply with California Air Resource Board (CARB) requirements, making it legal for use in California and other states with similar emissions regulations. If your check engine light is on due to a failing catalytic converter, this Magnaflow unit offers a well-built, direct-fit solution that meets stringent emissions standards.