Need a replacement catalytic converter for your 1991 Mitsubishi Eclipse? MagnaFlow offers high-quality catalytic converters engineered for 1991 Mitsubishi Eclipse 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 Mitsubishi Eclipse requirements and state vehicle registration to buy the best Eclipse catalytic converter online that fits your '91 Eclipse and meets your state’s emissions compliance.