MagnaFlow Conv DF 04-09 Audi S4 4.2L PS MT OE

MagnaFlow is well-known for making exhaust components that flow well and last a long time. This direct-fit catalytic converter is built to keep your 2004-2009 Audi S4 running smoothly and legally. It's designed to replace the original converter exactly, helping to ensure your check engine light stays off and your car passes emissions tests.

This converter uses strong 16-gauge 409 stainless steel tubing that resists corrosion, so it should hold up well over time. The tubing is mandrel-bent to maintain the original shape and flow characteristics, which helps your engine perform as intended and keeps fuel efficiency consistent. MagnaFlow uses 3D scanning during development to make sure this part fits just like the factory original, and the single laser fusion weld is designed to prevent leaks. It's also built with a compact, low-mass design for better thermal efficiency.

Installation is made easier because this is a direct-fit unit, meaning no cutting or welding is required – you can use your existing exhaust hangers and pipes. It comes with a nut to help with installation. This converter meets Federal emissions requirements set by the EPA for OBDII vehicles registered in states with Federal/EPA emission systems. Please note that this part is not CARB approved and cannot be shipped to California.