1) Antique Pontiac 2) Bygone muscle car 3) Bygone pontiac muscle car 4) Car in a Beach Boys hit 5) Car in a Beach Boys tune 6) Certain pontiac 7) Classic ferrari 8) Classic hot rod 9) Classic lemans series car 10) Classic muscle car 11) Classic performance car 12) Classic pontiac 13) Classic Pontiac letters Found on https://www.crosswordclues.com/clue/gto