The men's 4 × 400 metres relay event at the 1963 Pan American Games was held at the Pacaembu Stadium in São Paulo on 4 May.Full results

Results Rank Nation Athletes Time Notes Ollan Cassell, James Johnson, Richard Edmunds, Earl Young 3:09.62 Aristedes Pineda, Leslie Mentor, Víctor Maldonado, Hortensio Fucil 3:12.20 Anthony Carr, Rupert Hoilette, Malcolm Spence, Mel Spence 3:12.61 4 Carlos Mossa, Anubes da Silva, Geraldo Costa, Paulo de Araújo 3:17.1

References