Trean finished much the best to lead home a one-two for Paddy Twomey in the Goffs Million at the Curragh.
Dorigo and Ballinea Star cut out the early running as the field stretched right across the track before the race began to take shape in the last of the seven furlongs.
Green Dreamer was the first to make his move as he emerged from the packm but it was the 9-4 favourite Trean in behind who was travelling much sweeter and he swept to the front for Billy Lee.
Trean stayed on to come home half a length clear of his 80-1 stablemate Hi Corbett Court, who stayed on best of the rest to get up for second in the hands of Siobhan Rutledge.
"That was a good result. Trean is a class horse and was a class act in a conditions race," said Twomey.
"I was hoping he'd win but at halfway I wasn’t so sure.
"I thought Siobhan’s horse had a chance to run well. I said to her, 'go out and ride to win and see what happens’, and she nearly did it.
"It’s two syndicates that own them and they were 20 grand and 85 grand. It’s fantastic.
"The other horse (Hi Corbett Court) won a handicap in Sligo off 71 so it was a big step up."
Earlier on the Curragh card, Noble Exhibit put himself into the reckoning for the Futurity Trophy at Doncaster as he made all to win the Group Two Churchill Tyres Beresford Stakes.
The Frankel colt was sent straight to the front with City Of Dubai settling in on his hindquarters and as Wayne Lordan shook him up with two furlongs to go, the Paddy Twomey-trained City Of Dubai struggled to make inroads.
Noble Exhibit (10-11 favourite) saw out the trip to complete a productive afternoon for Aidan O'Brien’s two-year-olds following the victories of Haffner and Sun Goddess at Newmarket.
Ballydoyle stable representative Chris Armstrong said: "He did the exact same in Punchestown as he did here.
"He’s a horse that is well able to bowl along at a solid tempo and when Wayne got him balanced after turning in, he just gradually picked up.
"From the two down to the one, when he really asked him to quicken, he really did drop down and lengthen. He went out through the line well.
"He’s a horse that is progressing very quickly with each run.
"Now he goes into the mix with the others for the Futurity Trophy and the races in France at the back-end.
"He’s really one to look forward to for next year. He’s really starting to put everything together."
