Despite being two goals down on two separate occasions, the Foxes recovered to record their most memorable result in recent history.
Goals from David Nugent, Esteban Cambiasso and Jamie Vary and a brace from five-goal man Leonardo Ulloa cancelled out three strikes from United - who ended the game with 10 men.
Despite failing to get on the scoresheet himself, central midfielder Dean Hammond played a key part in the memorable victory, staying on the pitch for the entire game. The 31-year-old has been a key part of Leicester’s impressive start to the season, starting four of five games, including the 1-1 draw with Arsenal. A quietly effective presence in the centre of the park, Hammond told the official Foxes website how happy he was to feature in the game at the King Power Stadium, calling it the ‘best result of my career’.
The former Southampton man said: “I've had an opportunity this year and I'm just trying to take it a game at a time.
"It is probably the best result of my career. We probably don't want that every week but we scored at good times and never let them settle.”
Having gone two goals down inside 20 minutes, Hammond has admitted that he has no idea what catalysed the team to go on and claim a victory, let alone one as convincing as the Foxes achieved.
"I'm not sure what the catalyst was. We stuck to the game plan of wanting to attack.
"We know they had good attacking players but we wanted to get at them – and we were ruthless.”
Jamie Vardy was the star performer in the game, winning the man of the match award having played a part in all five goals - including scoring the fourth himself. Having been out with injury since the start of the season, it was the former non league forward’s first start in the Premier League, and Hammond was delighted to see him have such a large impact.
He continued: Vards has waited for his chance. He had an injury in pre-season. But he was brilliant. He worked so hard and had real quality with his finish, it was so calm.
"He's lightning. He reminds me in training when he runs past me. He's proper sharp but determined as well. He wants to score goals and is a proper team man.
"Vards has been fantastic and there are not many people as quick as him.
"He's worked on his game, he works very hard in training and has real belief in himself. He's happy and enjoys being at the club. And he deserves all the plaudits he has got.”
The Foxes will be looking to record their third straight win when they travel to Selhurst Park to face Crystal Palace on Saturday - a result that could take the Championship winners into the top four.