A 66-year-old Muslim man was sentenced to life in prison yesterday for plotting to attack JFK Airport and blow up its aviation fuel pipelines.

Kareem Ibrahim lowered his head and showed no emotion as a judge condemned him to spend the rest of his life in federal prison. The Shiite imam from Trinidad was convicted last year of conspiring with three other Muslim extremists to plan the airport attack.

Assistant US Attorney Marshall Miller told Brooklyn federal Judge Dora Irizarry that if the plot had not been thwarted by the FBI, they might have launched “a potentially devastating terrorist attack” and “would have caused catastrophic harm.”

The group’s “stated goal was to take out all of Queens. This was a dangerous situation,” Miller said.

Ibrahim declined to speak before he was sentenced, but at his trial last year he testified that he had been skeptical the plot would materialize.

“To me, to have a discussion and to have a plot were two different things,” Ibrahim testified.

Irizarry said, “I think he understood exactly what he was getting into.”