Need a replacement catalytic converter for your 2015 BMW 550i GT xDrive? MagnaFlow offers high-quality catalytic converters engineered for 2015 BMW 550i GT xDrive sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 2015 BMW 550i GT xDrive requirements and state vehicle registration to buy the best 550i GT xDrive catalytic converter online that fits your '15 550i GT xDrive and meets your state’s emissions compliance.