Tuning Autotechnik studio, or abbreviated as ATT, has developed a program based on the completion the BMW M3 Convertible (E93), dubbed Thunderstorm M3. The standard 4.0-liter V8 engine under the hood produces 420 hp M3 but tuners installed on a compressor reconfigured electronics and replaced with a new release system with optimized dynamic pressure, which gave an increase in the amount of power in the 80 hp On top experts from Autotechnik supplied BMW M3 convertible alternative tailpipes of the exhaust system, the sound of which should please not only the driver but also for all others. The amount of technical improvements is estimated tuners in 11,749 euros. Externally tuning M3 E93 convertible from ATT studio features stylish alloy 20-inch wheels, “shod” in the low-profile tires Michelin Pilot Sport 2s dimension 245/30 ZR 20 in front and 285/25 ZR 20 – back and lowered suspension. For these pleasures you must pay another 2,000 euros. Speed performance 500-horsepower BMW M3 Thunderstorm not yet been announced.