Engineers from Heffner Performance have been obsessed over R8 V8 Twin Turbo system since November 2009. In usual Heffner fashion they wanted to make something that looked like it could have come on the car from the factory…And they did it again!Specialists from Heffner concentrate its work on the exhaust system and two huge turbines. The result: the car is running on 6 psi and a 11.8 to 1 ARP and shows 536hp on the rear wheels at the dyno test. Tthats 180 more horsepower than the standard R8 model or more than a 50% increase.They also preparing a 100 octane program which will increase the power to 600 hp. at the rear wheels and time for 402 m. distance – high 11 seconds.Official photos of Heffner Audi R8 Twin Turbo is expected immediately after the company completed its work on the optical package but if you are in a hurry Heffner Performance already take orders for this modification.