Need a replacement catalytic converter for your 2003 Freightliner Sprinter 3500? MagnaFlow offers high-quality catalytic converters engineered for 2003 Freightliner Sprinter 3500 sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 2003 Freightliner Sprinter 3500 requirements and state vehicle registration to buy the best Sprinter 3500 catalytic converter online that fits your '03 Sprinter 3500 and meets your state’s emissions compliance.