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