Kim will face David Chung in Saturday's 36-hole final. Chung advanced thanks to come-from-behind, 2 and 1 win over Sung Hoon Kang at The Olympic Club.
Youth is the story of Saturday's final. Chung, who is 14 years and six months, would become the youngest Junior Amateur champion. If Kim hoists the trophy on Saturday, he will become the second-youngest winner. Tiger Woods was almost 15 years and seven months, two months younger than Kim, when Woods won the first of his three titles in a row in 1991.
Kim never trailed in his match against Curran, but Curran squared the match at No. 9. Kim reclaimed the lead at the 10th, then birdied No. 14 to go 2-up. He went 3-up thanks to a bogey by Curran at 14, then closed the match out on the 606-yard, par-5 16th.
'I am very surprised that I am going to the finals,' said Kim, who moved from Seoul to the United States in 2000. 'I hope I win, but second is not bad either.'
Chung, who was 5-down in his quarterfinal match but came back to win, was in trouble early. Kang went 1-up at the second, then built a 2-up margin at the 10th.
Chung rallied with wins at 11 and 12 to draw even. He won 13 and 14 to 2-up, then held on to close out the match on No. 17.
'I was just trying to make it to the quarterfinals,' Chung said.