Audi R8 Twin-Turbo with 536hp Announced by Heffner Performance [video]
 

A Florida-based tuner firm has released data on a new, twin-turbo Audi R8 that produces 536 rear-wheel horsepower, and has the capability of a sub-11 second quarter-mile. Details inside.
Read More: http://www.worldcarfans.com/10911162...er-performance

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