If you couldn’t get tickets to the "Unidos por Tí" concert of Altos de Chavón, an alternative is to attend the car racing that will take place all day on Saturday at the Las Americas Autodrome, of Km. 16 Las Americas Highway, on the way to Las Americas International Airport. The promoters say that the facility has been totally renovated after suffering substantial damages during Hurricane Georges. The new covered stands will be first used for the Car Racing Extravaganza slated for Saturday. Races begin at 9:30 am with a final evening race slated for 5 pm. Finals of the RS1 and RS2, PMI 1 and PMI 2 and GTS category competitions will be held. Also scheduled is the first Reid y Compañía Grand Prix competition, with 15 Chrysler Neons imported from Puerto Rico for the event. 60 cars are expected to compete in the evening race. Also slated is the appearance of the First Dragster Turbo Jet Presidente, a vehicle capable of running a quarter of a mile in five seconds and developing speeds of 310 miles per hour. 150 racing cars will participate in the extravaganza. For more information, contact J.M. Hidalgo at 616-1749.