MagnaFlow Standard Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 23351 helps keep the check engine light off. DIY installation is easy with the proper tools (no cutting or welding required). With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment. Designed to fit the 1991-1995 Ford Thunderbird and 1991-1995 Mercury Cougar, this direct-fit catalytic converter also interchanges with OE part F4SZ-5F250-A. Avoid potential exhaust leaks by using the included gaskets to get a proper seal. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.