Need a replacement catalytic converter for your 1998 Mercury Mystique? MagnaFlow offers high-quality catalytic converters engineered for 1998 Mercury Mystique sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1998 Mercury Mystique requirements and state vehicle registration to buy the best Mystique catalytic converter online that fits your '98 Mystique and meets your state’s emissions compliance.