MagnaFlow 2004-2009 Audi S4 OEM Grade Direct-Fit Stainless Steel Catalytic Converter

Direct-Fit Catalytic Converter

If you're looking to keep that check engine light off while ensuring your Audi S4 runs smoothly, the MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49871 is a solid choice. This isn't just any converter—it's designed specifically for the 2004-2009 Audi S4, and it fits like a glove without any cutting or welding. The stainless steel body is tough and resistant to corrosion, which is a must if you want longevity. Plus, the mandrel-bent tubing helps with free-flowing exhaust, so your engine can breathe better. I’ve installed a few of these myself, and I can tell you, the process is straightforward. Just grab the right tools, and you’re good to go. MagnaFlow's R&D team uses cutting-edge 3D scanning technology to ensure that this part matches the original equipment perfectly. The single laser fusion weld minimizes the risk of leaks, and the compact design enhances thermal efficiency, which is always a bonus. This converter meets or even exceeds the EPA's federal emissions standards, so you can rest easy knowing you're compliant with OBDII regulations for your registered vehicle. Just a heads up, though—this part is meant for racing competition only, so it’s not street legal. You’ll need to sign a Vehicle Compliance Waiver before you purchase. So, if you’re ready to upgrade your ride and keep it running clean, this is the way to go.

Notes:

Fits position: Left

This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles. Purchasing this product requires you to sign our Vehicle Compliance Waiver here.