Need a replacement catalytic converter for your 1975 Ford Mustang II? MagnaFlow offers high-quality catalytic converters engineered for 1975 Ford Mustang II sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1975 Ford Mustang II requirements and state vehicle registration to buy the best Mustang II catalytic converter online that fits your '75 Mustang II and meets your state’s emissions compliance.