Muhren worked with Huntelaar at Ajax and told the Manchester Evening News: "If United are looking to replace the goals lost through Ronaldo's sale then Huntelaar comes as near as you can get with a guarantee to score them.
"He's a goalscorer. Very, very dangerous in the box. He scored 76 league goals in 92 appearances for Ajax and despite what some people might tell you, that is not easy.
"I believe he can score goals at any level. He has proved he can do it on the international stage with 13 goals in 23 matches for Holland. He has proved he knows where the back of the net is throughout his career. He might need a little time to settle into the Premier League but he would score goals in England."
For United it would revive the 'goalden' era between 2001 and 2006 of Ruud van Nistelrooy when he smashed club scoring records.
"Huntelaar is not as fast as van Nistelrooy but he's not slow," said Muhren who coaches in Ajax's youth academy. "You need to play it to Klaas-Jan's feet. He's a target man who will hold the ball up for you and bring the midfielders into play. That's his style. He's also very good in the air.
"He needs wingers feeding him the ball and midfielders playing into him. Like Ruud, if you give him the right service in the box then nine times out of ten he will score. Play to his strengths and create opportunities and Huntelaar will pay you back in goals.
"He would be another good option for United with Michael Owen, Wayne Rooney and Dimitar Berbatov.
"Owen is fast over the first two or three yards and can win the balls put over the top. Rooney is a great talent and works hard and scores goals. He also has that ability to play wide and come in from that position. I love Berbatov's kind of arrogant style. With Huntelaar added to that department it would be a great mix."