Need a replacement catalytic converter for your 1980 Chevrolet Monza? MagnaFlow offers high-quality catalytic converters engineered for 1980 Chevrolet Monza sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1980 Chevrolet Monza requirements and state vehicle registration to buy the best Monza catalytic converter online that fits your '80 Monza and meets your state’s emissions compliance.