In a race where favorites Scott Dixon of Target Chip Ganassi Racing and Ryan Briscoe of Team Penske looked like the drivers to beat, the underdogs from Rahal Letterman Racing and A.J. Foyt Racing prevailed.

Hunter-Reay, driving the No. 17 Rahal Letterman Racing Team Ethanol entry, passed Manning's No. 14 ABC Supply/AJ Foyt Racing car on Lap 52 and led the final nine laps.

Manning, who pitted on Lap 39, inherited the lead on Lap 42 when Briscoe and Dixon went to pit lane for their final stops. Briscoe, who led a race-high 37 laps, came out of the pits just behind Dixon, a three-time winner at Watkins Glen. Hunter-Reay was in fourth.

Hunter-Reay's opportunity came on Lap 49 when Dixon spun while warming his tires under caution. Briscoe made contact with Dixon and both cars stalled in Turn 10. Hunter-Reay narrowly missed the mayhem and moved up to second place. Three laps later he drove inside Manning in Turn 1 and passed for the lead.

The victory was the first for Rahal Letterman Racing since 2004. Manning's second-place finish was his team's best since Airton Dare won at Kansas in 2002.

Tony Kanaan finished third, recovering from a crash during the morning warm-up, and Buddy Rice was fourth. Marco Andretti was fifth, and Dale Coyne Racing teammates Bruno Junqueira and Mario Moraes were sixth and seventh, respectively.

Dixon finished 11th, retaining the IndyCar Series points lead over Helio Castroneves, who finished 16th. Briscoe finished 12th.

Camping World Grand Prix at The Glen Results

1. (3) Ryan Hunter-Reay, Dallara-Honda, 60, Running

2. (8) Darren Manning, Dallara-Honda, 60, Running

3. (6) Tony Kanaan, Dallara-Honda, 60, Running

4. (17) Buddy Rice, Dallara-Honda, 60, Running

5. (7) Marco Andretti, Dallara-Honda, 60, Running

6. (11) Bruno Junqueira, Dallara-Honda, 60, Running

7. (13) Mario Moraes, Dallara-Honda, 60, Running

8. (18) Graham Rahal, Dallara-Honda, 60, Running

9. (20) Hideki Mutoh, Dallara-Honda, 60, Running

10. (15) E.J. Viso, Dallara-Honda, 60, Running

11. (4) Scott Dixon, Dallara-Honda, 60, Running

12. (1) Ryan Briscoe, Dallara-Honda, 60, Running

13. (19) Mario Dominguez, Dallara-Honda, 60, Running

14. (14) Danica Patrick, Dallara-Honda, 60, Running

15. (12) Will Power, Dallara-Honda, 60, Running

16. (26) Helio Castroneves, Dallara-Honda, 59, Running

17. (21) Ed Carpenter, Dallara-Honda, 59, Running

18. (23) Jaime Camara, Dallara-Honda, 51, Contact

19. (22) A.J. Foyt IV, Dallara-Honda, 47, Contact

20. (25) Milka Duno, Dallara-Honda, 45, Contact

21. (16) Enrique Bernoldi, Dallara-Honda, 44, Contact

22. (10) Vitor Meira, Dallara-Honda, 38, Contact

23. (5) Oriol Servia, Dallara-Honda, 38, Mechanical

24. (9) Dan Wheldon, Dallara-Honda, 19, Mechanical

25. (2) Justin Wilson, Dallara-Honda, 16, Mechanical

26. (24) Jay Howard, Dallara-Honda, 15, Mechanical

Race Statistics

Winner's average speed: 106.403 mph

Time of race: 1:54:01.1795

Margin of victory: 2.4009 seconds

Cautions: 6 caution flags for 14 laps

Lead changes: 4 among 4 drivers

Lap leaders: Briscoe 1-20, Meira 21-24, Briscoe 25-41, Manning

42-51, Hunter-Reay 52-60.