Four group I winners--Ad Valorem, Aussie Rules, George Washington, and Hurricane Run--will be added to the Coolmore Stud stallion roster after their final outings in the Breeders' Cup at Churchill Downs."We have some exceptional new recruits for 2007," said manager Christy Grassick. "These are four seriously well-bred horses, by the right sires, from top class families, and all have excelled at the very highest level on the racecourse."Four-year-old Hurricane Run, the 2005 Cartier Horse of the Year after winning the Prix de l'Arc de Triomphe Lucien Barriere (Fr-I) and Budweiser Irish Sweeps Derby (Ire-I), scored group I wins in this year's King George VI and Queen Elizabeth Diamond Stakes in England and the Tattersalls Gold Cup in Ireland. Sired by Coolmore leading stallion Montjeu and a champion in Ireland and France, Hurricane Run has won eight of 13 races and earned $4,155,280. He is out of the Surumu mare Hold on.Another Cartier winner, George Washington, who was the top-priced yearling at the Tattersalls October sale in 2004 at 1.15 million guineas, won the Phoenix (Ire-I) and National (Ire-I) Stakes as a 2-year-old the year of his championship. This year, he's Timeform's highest rated horse of any age, due to his impressive victories in the Two Thousand Guineas Stakes (Eng-I) and Queen Elizabeth II Stakes (Eng-I).By deceased Coolmore stallion Danehill out of the Alysheba mare Bordighera, George Washington has won six of nine races and earned $1,285,399.Aussie Rules not only won this year's French Two Thousand Guineas (Fr-I) in the spring, but Keeneland's Shadwell Turf Mile Stakes (gr. IT) Oct. 7 in his last start. The 3-year-old son of Danehill out of the Alzao mare Last Second has won four of 11 starts and earned $874,570.Four-year-old Ad Valorem, Ireland's champion 2-year-old male of 2004 the year he also won England's group I Middle Park Stakes, has carried that group I form forward to this year. He captured the Queen Anne Stakes (Eng-I) at Royal Ascot. In his last outing, he placed in the Woodbine Mile Stakes (Can-IT).A son of Danzig out of the Relaunch mare Classy Women, Ad Valorem has four wins from a dozen races and earnings of $800,332.