BMW M3 with 520 HP by ATT-TEC

German tuning firm ATT-TEC from the city of Rastatt in Baden has optimized a BMW M3 Cabriolet (E93) for much more power and sinister looks.

Source: http://feeds.worldcarfans.com/~r/worldcarfans/Jxfz/~3/GUTJgJCx_1M/bmw-m3-with-520-hp-by-att-tec

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