Need a replacement catalytic converter for your 1977 Oldsmobile Cutlass? MagnaFlow offers high-quality catalytic converters engineered for 1977 Oldsmobile Cutlass 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 Cutlass requirements and state vehicle registration to buy the best Cutlass catalytic converter online that fits your '77 Cutlass and meets your state’s emissions compliance.