Magnaflow 2015 M3 3 Underbody Direct Fit Converter

When your M4's check engine light comes on, and you suspect it's the catalytic converter, Magnaflow has a direct-fit replacement that's built to keep your BMW running right. This package includes the catalytic converter itself, along with two Torca clamps and essential hardware to get the job done. It's designed to meet federal emissions requirements for OBDII Federally registered vehicles, so you can be confident it'll pass emissions testing where required.

Magnaflow builds this converter using high-strength 16-gauge 409 stainless steel tubing for excellent corrosion resistance, ensuring it holds up over time. The tubing is mandrel-bent to match the original equipment's design and geometry, helping to maintain factory performance and fuel efficiency. They use 3D scanning during development to ensure a precise fit, just like the original part. The single laser fusion weld is designed to minimize the chance of leaks, and the compact, low-mass design contributes to better thermal efficiency.

Installation is made simpler because this is a direct-fit unit, meaning no cutting or welding is necessary. The included Torca Accuseal clamps provide a secure, even seal around the exhaust system. This converter is designed to interchange with OE parts 18 30 7 851 178 and 18 30 8 094 373.