[2] He was sired by Northfields, an American horse whose biggest win came in the Louisiana Derby in 1971, before spending most of his stud career in Europe.

His other winners included Northern Treasure, No Pass No Sale (Poule d'Essai des Poulains), North Stoke and Oats.

Northjet's dam Jellatina was a daughter of the 1000 Guineas winner Queenpot,[3] and had previously produced Madang who won the Premio Melton (twice) and the Prix du Gros Chêne.

On his final Italian start he won the Group Two over 1200m at Capannelle Racecourse in Rome, beating Marching On by one and a half lengths and setting a new track record of 1:08.8.

He then finished third behind Price Mab and Diamond Prospect when carrying top weight in the Prix du Palais-Royal over 1400m at Longchamp Racecourse.

[4] On 16 August at Deauville Racecourse, Northjet was one of eleven horses to contest the Group One Prix Jacques Le Marois over a straight 1600m.

The colt then produced a "spectacular surge"[4] to go clear of the field and won very easily by five lengths from To-Agori-Mou, who beat Kings Lake by a nose for second place.

[4] At the end of his racing career, Northjet was syndicated at $375,000 a share, giving him a theoretical value of $15 million and was sent to stand at the Airdrie Stud in Kentucky.