A spirited Thailand, who won the first leg 2-0 in Bangkok on Wednesday (December 17), rallied from 3-0 down at the packed Bukit Jalil stadium to claim 4-3 aggregate win.
With the win, Thailand coach Kiatisak Senamuang became the first man to win the Asuean title both as a player and a coach.
The 41-year-old won the title three times as a player. He was a member of the Thai team that beat Malaysia in the final of the inaugural edition in 1996.