With just a 17-point spread between championship leader MarcoAndretti and fourth-place Chris Prey -- Benny Moon and Victor Ramos are second and third,respectively -- rounds seven and eight of the Skip Barber National Championship Presented byRACER are at Hallett Motor Racing Circuit, 35 miles west of Tulsa, Okla., this weekend, June4-6.

Through the first six of the year's 14 races, each of these guys has won a race – Moon twice.Rounds five and six were at Road America May 21-23, where Andretti and Lorenzo Mandarino(seventh in points despite missing rounds one and two at Sebring in March) each took his maidenSkip Barber National victory.Andretti's Sunday win, combined with a second place on Saturday, shot Andretti over Moon inthe points chase. Gerardo Bonilla has also shown the speed to win before the season is over, ashas Robbie Pecorari and Sergio Perez.When a win will get you 20 points, everybody's still in the game.Hallett is a 1.8-mile, 10-turn road course with more than 80 feet of elevation change, and isdesigned to be run in either direction.