ATT Presents Thunderstorm M3 with up to 500HP

Autotechnik + Tuning or ATT has given the M3 Convertible a bit more fire over its belly. The car is already powerful with its standard 4.0-litre V8 pushing out 309kW (420hp). But in the tuning world enough is not at all enough.

By giving it a compressor system, optimizing engine software and installing a new exhaust system with optimized dynamic pressure, ATT was capable to extract an extra 59kW (80hp) to make it an even 500hp (368kW). For added enjoyment the tailpipes were apparently tuned to provide two different sounds. ATT will do the engine job for €11,749 including installation.

Wheels fitted are 8,5x20 and 10x20 alloys while the matching tyres are Michelin Pilot Sport 2s measuring 245/30 ZR 20 and 285/25 ZR 20 front and rear correspondingly. Although normally praised as a very competent handler, ATT felt their M3 needed an extra dose of road-holding ability. As a result they included a KW coilover suspension system in the kit for about €2,000.

The interior might be ordered with a cabin largely made of carbon fibre or Swarovski crystals. ATT calls it the Thunderstorm M3 and with a name similar to that we cannot wait to notice the performance figures.