Need a replacement catalytic converter for your 2014 Mercedes-Benz SL550? MagnaFlow offers high-quality catalytic converters engineered for 2014 Mercedes-Benz SL550 sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 2014 Mercedes-Benz SL550 requirements and state vehicle registration to buy the best SL550 catalytic converter online that fits your '14 SL550 and meets your state’s emissions compliance.