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4Audi reveals driver lineup and livery for Rolex 24 at Daytona

Audi has announced driver lineups for its customer teams running the R8 LMS GTD in this year's Rolex 24 at Daytona. The Rolex 24 is the first event for the inaugural season of the new United SportsCar Championship series, which merges the old Grand-Am Series with the American Le Mans Series. The new series kicks off January 25.

10Combined ALMS/Grand-Am series books TV deal to air entire season on Fox Sports

With Speed TV switching over to Fox Sports 1, there's been a fear among auto enthusiasts that we would be losing out on an easily accessible source for motorsports. A freshly inked agreement between IMSA and Fox, though, should put minds at ease. The deal, which was announced today will see the new United SportsCar Racing come to the new channel. United SportsCar Racing is the entity that emerged from the merger of the Grand-Am Series and American Le Mans Series.

28GRAND-AM, IMSA announce deal to bring DTM racing to US

It won't be until 2015 at the earliest, but the International Motor Sports Association (IMSA), Grand-Am and the Internationale Tourenwagen-Rennen have agreed to a licensing and cooperation deal that could bring a version of Germany's DTM series to the US.

6Lamborghini Super Trofeo one-make racing series coming to America

Starting in June, racing fans in North America will have another way to get their fix. Lamborghini is bringing its Super Trofeo series to the US and Canada in a "long-term" deal that kicks off in a six-race season this year and should bring some extra excitement to the newly formed United SportCar Racing series in coming years.

32Grand-Am, ALMS merger results in new United SportsCar Racing series

After the merger between Grand-Am and the American Le Mans Series was announced last year, a contest was held to name the new combined series, and that new name is now officially the United SportCar Racing series. This new branding will take place at the start of the 2014 season beginning with the Rolex 24 at Daytona.

14The 2013 Rolex 24-hour race at Daytona comes down to the last hour [spoilers, w/video]

It took 24 hours to run the race, but it was the last one was stuffed with the high action as four cars were still trying to figure out how to gain victory on the track and in the pits. Along with the obligatory crashes, spins, mechanical issues and retirements had come numerous penalties, a double-digit number of full-course yellows and two hours of fog that turned early Sunday morning into a stretch of parade laps.

8Mega Galleries: All day and into the night at the Rolex 24 at Daytona

The Rolex 24 at Daytona is still running, and we spent yesterday and a healthy portion of the evening absorbing the agitato thunder of the Daytona Prototypes, the mezzo-soprano howl of the GT cars, the RVs, the bonfires, the numerous full-course yellows, the back-course braking into the Bus Stop and, of course, the ferris wheel.

36Mazda6 GX Grand-Am racer goes where no diesel sedan has gone before

There has never been a four-door diesel sedan in the Grand-Am series, until now: The blunt, bewinged grille of the Mazda6 GX has blown right through that wall. It's said that racing improves the breed, but usually the breed has gone on sale when the racing begins. One of the unusual aspects of the Mazda6 GX, on the other hand, is that while the diesel won't go on sale to the public until later this year, it will already have tasted racing blood by the end of the day. That kind of reversal is mor

5Notes from day one of the Rolex 24 at Daytona

We came to Daytona Beach, Florida where you can drive on the beach, gun shops outnumber doughnut shops and you can putt-putt and fish for alligators at the same place. But we're not here for any of that – we've made the trip with Audi in order to experience the Rolex 24 at Daytona, the first race in the 2013 Grand-Am season and the only 24-hour race in America.

5Mazda6 diesel to race at Rolex 24, team and drivers announced

Mazda is getting serious about showing off the Skyactiv-D turbo-diesel four-cylinder engine in the Mazda6. The automaker has just announced it will campaign three diesel Mazda6 racers in the Grand-Am GX class of the upcoming 2013 Rolex 24 at Daytona in a quest to walk away with the company's 24th class win. Mazda partnered with SpeedSource to develop the race version of the new sedan, with Japanese and American engineers lending a helping hand where needed. Meanwhile, Freedom Autosport and Visit

22Diesel-powered Mazda6 going racing in Grand-Am Series

The diesel version of the 2014 Mazda6 won't be hitting North American showrooms until the middle of next year, but we won't have to wait that long to see the car in action. Mazda will enter its midsize sedan in the new Grand-Am GX class with a Skyactiv-D clean diesel engine under the hood, and the car will make its racing debut at the Rolex 24 at Daytona on January 26. This will be the first time in the race's 60-year history that a diesel-powered car has competed in the 24-hour race.

8Porsche moving on from 911 GT3 RSR Type 997, new 991-based racer will be ready by 2014

The 991 Porsche 911 is already on the streets, but we're going to have to wait until 2014 before we see the car in race form on the track. Porsche Motorsport recently announced that it is ending development of the current 997-based 911 GT3 RSR used in the American Le Mans Series in preparation of the new car. Porsche also revealed that its ALMS GT class partnership with Flying Lizard Motorsports is being discontinued as well. While there will be no more 997 cars built for 2013, Porsche will sti

18ALMS and Grand-Am make merger official, first joint race named

Earlier reports of a merger between the American Le Mans Series and the Grand-Am Rolex Sports Car Series have proven to be well founded today, as representatives from both series have confirmed that the merger is indeed taking place.

10Lotus Evora GX to race in U.S. Grand-Am series

The Lotus Evora has taken many forms as a race car over the past few years, starting in 2009 with the Type 124 Endurance Racer built for the FIA GT. Since then, Lotus has developed a GT4 Cup version designed for a one-make series, the Evora GTE that currently competes in the GT class of the ALMS and the recently introduced Evora GTC.

21Ford Racing offering B-spec upgrade kit for Fiesta owners

Motorsports is expensive in any form, although there are ways to do it without completely breaking the bank. One of those ways is the relatively new B-Spec class featuring the compact offerings of Honda, Mazda, Toyota, Kia, Mini and more that allows racers to compete in SCCA and Grand-Am racing on a relatively level and inexpensive playing field.

19First pics of the Grand-Am Rolex Series Audi R8 LMS

Audi of America recently took delivery of a U.S.-customer-spec R8 LMS Ultra meant for testing next month, and the gents at Quattroworld were able to get a picture of it. Being lighter, safer, and better balanced, the V10-powered racer with up to 570 horsepower is expected to outdo its multiple-title-winning predecessor.

832012 Chevrolet Corvette Daytona Prototype unveiled

It's not every day that we get to feast our eyes on a new Corvette, and even if this isn't the much-anticipated C7, well, at least this one is in the here and now. This 2012 Chevrolet Corvette Daytona Prototype will race in the Grand-Am Road Racing Series next season, making its competitive debut at the Rolex 24 at Daytona International Speedway on January 28.

13Chevy bringing Belle Isle Grand Prix back to Detroit in 2012

Open-wheel racing is returning to the Motor City next summer. The Chevrolet Detroit Belle Isle Grand Prix will be held June 1-3, the first of a three-year sponsorship deal between General Motors, Penske Corporation and the IndyCar series. The weekend of racing will feature not only an IndyCar race, but the first Grand-Am event ever held on Detroit's island course.

5Audi homologating R8 LMS for Grand Am racing

Audi has been racking up motorsports wins all over the world thanks to its R8 LMS track star. The GT3 racer has compiled over 100 victories in Europe, Asia, South America and Australia. Now it's time for the four-ringed race car to earn a few checkered flags in North America, as Audi has announced that it is bringing the R8 LMS Stateside to run in the Grand-Am series.

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