Need a replacement catalytic converter for your 1985 Oldsmobile Firenza? MagnaFlow offers high-quality catalytic converters engineered for 1985 Oldsmobile Firenza sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1985 Oldsmobile Firenza requirements and state vehicle registration to buy the best Firenza catalytic converter online that fits your '85 Firenza and meets your state’s emissions compliance.