Need a replacement catalytic converter for your 1990 Plymouth Sundance? MagnaFlow offers high-quality catalytic converters engineered for 1990 Plymouth Sundance 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 Plymouth Sundance requirements and state vehicle registration to buy the best Sundance catalytic converter online that fits your '90 Sundance and meets your state’s emissions compliance.