Need a replacement catalytic converter for your 1991 Ford E-350 Econoline? MagnaFlow offers high-quality catalytic converters engineered for 1991 Ford E-350 Econoline sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1991 Ford E-350 Econoline requirements and state vehicle registration to buy the best E-350 Econoline catalytic converter online that fits your '91 E-350 Econoline and meets your state’s emissions compliance.