Need a replacement catalytic converter for your 1991 Mercury Colony Park? MagnaFlow offers high-quality catalytic converters engineered for 1991 Mercury Colony Park sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1991 Mercury Colony Park requirements and state vehicle registration to buy the best Colony Park catalytic converter online that fits your '91 Colony Park and meets your state’s emissions compliance.