In 1976, while Efraín was alive, a tribute song to him, ""Cuchú Cuchá"" became a sleeper hit in the Dominican Republic. The same song was later versioned by Jossie Esteban and his former group, Patrulla 15, and became a huge merengue hit in Puerto Rico, the Dominican Republic and New York City. Just after Efraín's death, the Puerto Rican plena collective Los Pleneros del Quinto Olivo recorded a tribute song, "¿Dónde estará Mon?" (""Where would Mon be?"") that spoke fondly of Efraín (although the song did have some inaccuracies concerning him).