Audi claim a one-two at Long Beach

Penske Porsche dominated the first half of the race only to fade and fall to fourth and fifth overall later on, losing the LMP2 class win to the Highcroft Acura, which completed the overall top three, on the penultimate lap.

Pat Long had jumped from fourth to first in the No.6 Penske Porsche at the start of the race, leading teammate Timo Bernhard and Fernandez Acura's Luis Diaz in the opening laps.

But Luhr steadily crept into contention for Audi in the opening stint, moving up from an initial sixth place to third - right on the Porsches' tails - within the first half an hour. He then took second from Bernhard, before coming in for an early pit stop and handing over to Werner after 45 minutes.

Penske stayed out for a further ten minutes and briefly made a break from the Audi, rejoining 10 seconds clear of Werner and with Bernhard's co-driver Romain Dumas now ahead of Long's partner Sascha Maassen.

But moments later a caution for debris brought the lead group back together again, and both Penske drivers found themselves unable to maintain the pace in the final stint.

Maassen was passed by both Werner and Pirro shortly after the restart and subsequently fell back into the clutches of Highcroft driver David Brabham, who was mounting a scintillating charge through the field having taken over from teammate Scott Sharp.

Werner then closed in on Dumas, taking the lead with 20 minutes to go. A final caution to retrieve the spun Intersport Lola gave Pirro a chance to make it an Audi one-two, and he duly vaulted past Dumas on the restart.

While Werner edged away to secure Audi's win, Dumas didn't give up and put Pirro under plenty of pressure in the closing minutes. But the Penske driver was himself being pursued by the flying Brabham - who dived ahead on the penultimate lap to take third overall and Highcroft's first ever LMP2 win.

Maassen followed close behind in fifth place, with Christian Fittipaldi securing sixth for Andretti-Green Acura with a late move on Diaz's co-driver Adrian Fernandez, who also lost out to Dyson Porsche driver Butch Leitzinger as he tried to regain momentum.

The racing was even closer in GT2, with the Flying Lizard Porsches heading an extremely tight five-car lead battle in the first stint.

But when the class leaders all pitted under yellow at half-distance, Tafel Ferrari chose to only change two tyres on the Dirk Muller/Dominik Farnbacher car, allowing the German driver to jump to the head of the pack.

Muller then resisted enormous pressure from Flying Lizard duo Wolf Henzler and Patrick Pilet to clinch the GT2 win - all three cars covered by just 0.5 seconds at the flag.

GT1 was more straightforward, with Jan Magnussen and Johnny O'Connell leading Corvette teammates Oliver Gavin and Olivier Beretta throughout.

Pos  Cl   Drivers                  Car                     Laps
 1.  P1   Luhr/Werner              Audi R10 TDI            71
 2.  P1   Biela/Pirro              Audi R10 TDI            71
 3.  P2   Brabham/Sharp            Acura ARX-01b           71
 4.  P2   Dumas/Bernhard           Porsche RS Spyder       71
 5.  P2   Maassen/Long             Porsche RS Spyder       71
 6.  P2   Herta/Fittipaldi         Acura ARX-01b           71
 7.  P2   Leitzinger/Franchitti    Porsche RS Spyder       71
 8.  P2   Fernandez/Diaz           Acura ARX-01b           71
 9.  P2   Dyson/Smith              Porsche RS Spyder       71
10.  P2   Bonilla/Devlin           Mazda Lola B07-46       70
11.  GT1  O'Connell/Magnussen      Corvette C6.R           70
12.  GT1  Gavin/Beretta            Corvette C6.R           70
13.  GT2  Farnbacher/Muller        Ferrari 430 GT          68
14.  GT2  Bergmeister/Henzler      Porsche 911 GT3 RSR     68
15.  GT2  van Overbeek/Pilet       Porsche 911 GT3 RSR     68
16.  P1   Lewis/McMurry            Creation CA07-002 Judd  67
17.  GT2  Jeannette/Mowlem         Ferrari 430 GT          67
18.  GT2  Brix/Friesacher          Ferrari 430 GT          66
19.  GT2  Stippler/Basseng         Porsche 911 GT3 RSR     65
20.  GT2  Neiman/Pechnik           Porsche 911 GT3 RSR     65
21.  GT2  Carrapatoso/Swartzbaugh  Porsche 911 GT3 RSR     65
22.  GT2  Salo/Melo                Ferrari 430 GT          65
23.  GT2  Gigliotti/Peterson       Riley Corvette C6       64
24.  GT2  Drayson/Cocker           Aston Martin Vantage    64
25.  GT2  Robertson/Murry          Doran Ford GT Mk.VII    63
26.  P1   Field/Dayton/Berry       Lola B06/10 AER         62
27.  GT2  Milner/Sutherland        Panoz Esperante         51