The Kings had set United a decent 169-run target but a catch dropped by Mohammad Rizwan became a turning point in the thriller, allowing Asif Ali to smash 70 runs in 38 balls.
United’s Phil Salt scored 46 runs, while Shadab Khan hit a last-ball sixer to add to his team’s glory.
Earlier, United had won the toss and elected to bowl first. But things did not really go United’s way as the Kings top order hit boundaries left, right, and centre.
Opener Babar Azam top-scored for the Kings with 68 runs off 50 balls — 40 off those coming off 10 boundaries. One-down, Liam Livingstone added a blistering knock of 56 off 31, with five fours and four sixes.
Azam and Livingstone put together 78 runs for the second wicket partnership.
Rumman Raees took three wickets for 27 runs in his four overs, while Faheem Ashraf, Shadab Khan, and Amad Butt took a wicket each for the United.
Imad Wasim (c), Colin Munro, Babar Azam, Mohammad Amir, Colin Ingram, Usman Shinwari, Mohammad Rizwan, Ravi Bopara, Sikandar Raza, Awais Zia, Usama Mir, Aaron Summers, Sohail Khan, Iftekhar Ahmed, Ali Imran, Abrar Ahmed, Aamir Yamin, Ben Dunk, Liam Livingstone, Jahid Ali, Umer Khan
Mohammad Sami (c), Luke Ronchi, Faheem Ashraf, Shadab Khan, Asif Ali, Ian Bell, Rumman Raees, Samit Patel, Phil Salt, Hussain Talat, Waqas Masood, Sahibzada Farhan, Zafar Gohar, Cameron Delport, Nasir Nawaz, Mohammad Musa, Wayne Parnell, Zahir Khan, Ammad Butt, Rizwan Hussain