MagnaFlow Conv DF 97-98 BMW 540i 4.4L / 740I 4.4L / 96-98 740IL 4.4L P/S

If your 1996-1998 BMW 740iL is showing a check engine light related to emissions, or if the original catalytic converter is failing, it's time for a replacement. This direct-fit catalytic converter from Magnaflow is designed to get your BMW back to running cleanly and efficiently, ensuring it passes emissions tests and keeps that warning light off. It's built to meet Federal/EPA emissions requirements for OBDII vehicles.

Magnaflow uses free-flowing, mandrel-bent tubing in this converter, which helps maintain factory performance and fuel efficiency. The construction is primarily 16-gauge 409 stainless steel for the tubing and 308 stainless steel for the welds, offering solid corrosion resistance for a long service life. They replicate the original equipment's spun body design, and a single laser fusion weld is used to greatly reduce the chance of exhaust leaks. This compact, low-mass design also helps with thermal efficiency. Because it's a direct-fit unit, installation is made simpler as it uses OE-sized hangers and comes with the necessary gaskets to ensure a proper seal without cutting or welding.

This converter is designed to interchange with several original equipment part numbers, including 18 30 7 505 322 and 18 30 1 437 354. Remember that this part is EPA-compliant and suitable for Federal/OBDII emissions systems, but it is not CARB approved and cannot be shipped to California.