MagnaFlow Direct Fit California Grade Catalytic Converter 5561172 MagnaFlow Direct Fit OEM Grade Catalytic Converter 51912 Advance Auto MagnaFlow Direct Fit California Grade Catalytic Converter with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter MagnaFlow 51627 OEM Grade Direct Fit Catalytic Converter MagnaFlow California Grade CARB Compliant Direct Fit Catalytic. Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct Fit Catalytic Converter 551519. 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. Designed to fit the 2006 Mercedes Benz S430, 2006 Mercedes Benz S500, and more, this direct fit catalytic converter also interchanges with OE parts 220 490 06 20 80 and 220 490 06 20, among others. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.