Need a replacement catalytic converter for your 1978 Buick Skyhawk? MagnaFlow offers high-quality catalytic converters engineered for 1978 Buick Skyhawk 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 Buick Skyhawk requirements and state vehicle registration to buy the best Skyhawk catalytic converter online that fits your '78 Skyhawk and meets your state’s emissions compliance.