Need a replacement catalytic converter for your 1978 Fiat 124? MagnaFlow offers high-quality catalytic converters engineered for 1978 Fiat 124 sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1978 Fiat 124 requirements and state vehicle registration to buy the best 124 catalytic converter online that fits your '78 124 and meets your state’s emissions compliance.