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