Need a replacement catalytic converter for your 1990 Mercury Sable? MagnaFlow offers high-quality catalytic converters engineered for 1990 Mercury Sable sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1990 Mercury Sable requirements and state vehicle registration to buy the best Sable catalytic converter online that fits your '90 Sable and meets your state’s emissions compliance.