Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49918. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency.This direct-fit catalytic converter is designed specifically for the 2004-2009 Audi S4 and interchanges with OE parts 8E0 254 551 QX and 8E0 254 554 QX. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems. Direct Fit Catalytic Converter; OEM Grade Series; 2.5 in. Tubing/Inlet/Outlet OD; Overall L-48.30 in.; O2 Sensor Location Pre/Post Conv.; Not Air Tube Kit Adaptable; MagnaFlow specializes in superior catalytic converter and exhaust technology and each converter is designed to the exact original equipment specifications while keeping the Check Engine Light off. What's Included: Magnaflow Conv DF 04-06 Audi S4 4.2L Vehicle Fitment: 2004-2008 Audi S4 Base 2004-2009 Audi S4 Cabriolet 2004-2008 Audi S4 Avant
