Need a replacement catalytic converter for your 1981 Ford F-250? MagnaFlow offers high-quality catalytic converters engineered for 1981 Ford F-250 sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1981 Ford F-250 requirements and state vehicle registration to buy the best F-250 catalytic converter online that fits your '81 F-250 and meets your state’s emissions compliance.