Bhullar wins Ssian tour's season-opener
The 21-year-old had started the day six shots off the lead but sank an eagle and six birdies to win the $300,000 event by a single stroke.
South Korea's Hwang Inn-choon signed for a 69 to claim second place while last year's runner-up, Tetsuji Hiratsuka of Japan, took third after a 68.
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Hide AdOvernight leader Kiradech Aphibarnrat of Thailand capitulated on the final day with a 73 seeing him drop down the leaderboard to finish tied fourth alongside Jbe Kruger of South Africa.
"It's amazing. I have no words to describe it, I'm totally speechless," said Bhullar.
"When I woke up this morning I just wanted to shoot a good number. I never ever thought I was going to shoot a 64 and win by one.
"It's like a dream coming true. My first event of the year and winning at the start of the season will give me a lot of confidence."
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Hide AdBhullar's round began in promising fashion with an eagle on the par-five second after his approach shot rolled to within three feet of the pin.
He added four birdies before the turn while further gains on the 15th and the last secured the thrilling victory.
"After 15, where I made a good curling putt, I told myself to make par on 16 and 17 and make birdie on 18," he added. "Everything happened the way I decided. On 18, it was amazing. I told myself that the putt was to win the tournament.
"I'm sure my confidence will go up a long way. I'm looking forward to next week (Avantha Masters in India)."