Need a replacement catalytic converter for your 1977 Oldsmobile Custom Cruiser? MagnaFlow offers high-quality catalytic converters engineered for 1977 Oldsmobile Custom Cruiser sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1977 Oldsmobile Custom Cruiser requirements and state vehicle registration to buy the best Custom Cruiser catalytic converter online that fits your '77 Custom Cruiser and meets your state’s emissions compliance.