By ESPNSTAR.com staff
They will now meet Al Kuwait, who saw off Saudi outfit Al Ettifaq 6-1 on aggregate.
Arbil, who reached the semi-finals of the competition last year, entered Tuesday's game at the Chonburi Stadium with a commanding 4-1 lead from the first leg, and it took them just 18 minutes to edge further ahead when Saad Abdulameer glanced home a corner.
Seven minutes later, the Sharks hit back when Suttinun Phukhom scored from close range but three minutes after the hour mark, the visitors went ahead again Amjed Radhi's shot took a wicked deflection Fode Bangaly Diakite and sailed past a hapless Sinthaweechai Hathairattanakool.
Eight minutes later, Radhi ended the contest when he netted his second, before Mustafa Ahmad completed the trashing with a fourth in the 82nd minute.
Later on in the evening, it was confirmed that Al Kuwait would be Arbil's opponents in the final after the Kuwaiti side beat Al Ettifaq 2-0 to advance 6-1 on aggregate.
Following a goalless first half, Rogerinho opened the scoring in the 57th minute when he reacted first to a loose ball and sent a volley into the back of the net.
15 minutes later, Al Kuwait doubled their lead when Rogerinho sent Nasser Al Qahtani racing down the right, who drew Fayz Al Sabiay out before slipping the ball to Abdulhadi Khamis for a simple tap-in.
The final is scheduled to take place at the Franso Hariri Stadium in Arbil on November 3.