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10Spy Shots: Audi R15 TDI spied ahead of Sebring debut

Following up on the immense success of the R10 TDI race car, Audi has been hard at work on its successor. A pair of new R15 TDI race cars will make their race debut at the Sebring 12-hour race next month, but the highly anticipated Le Mans Prototype has already been seen running development laps.

20Audi develops R8 GT3 racer

Click above for a hi-res gallery of the Audi R8 GT3 car

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