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