Keep the check engine light off with the MagnaFlow OEM Grade Federal/EPA 21-581 direct mount catalytic converter. With features like free-flowing mandrel-bent tubing and highly corrosion-resistant stainless steel construction, easily install this spun body converter yourself using the proper tools, with 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 sure your new part will fit and perform like the original equipment. By replicating the OE spun body design, the unique laser fusion welding greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. Designed to fit the 2015-2019 Volkswagen GTI, 2015-2018 Volkswagen Golf, and more, this direct fit catalytic converter also interchanges with OE parts 5Q0 254 501 NX and 5QM 254 501 G Hardware is included to eliminate the hassle of working with corroded factory parts. This replacement part is designed to meet or exceed Federal emission requirements set by the EPA as required by law for federally registered OBDII vehicles with California or Federal/EPA emission systems.