Need a replacement catalytic converter for your 1986 Plymouth Horizon? MagnaFlow offers high-quality catalytic converters engineered for 1986 Plymouth Horizon sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1986 Plymouth Horizon requirements and state vehicle registration to buy the best Horizon catalytic converter online that fits your '86 Horizon and meets your state’s emissions compliance.