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