Need a replacement catalytic converter for your 1980 Pontiac Grand LeMans? MagnaFlow offers high-quality catalytic converters engineered for 1980 Pontiac Grand LeMans sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 1980 Pontiac Grand LeMans requirements and state vehicle registration to buy the best Grand LeMans catalytic converter online that fits your '80 Grand LeMans and meets your state’s emissions compliance.