Senner Tuning AG starts by upping the output from the S5's 3.0-liter supercharged V6 to 375 horsepower and 365 pound-feet of torque – gains of 42 and 41, respectively. A new sport exhaust system was also created specifically for this S5, and it now uses quad-exhaust tips out back. We'd love to hear what this thing sounds like at full throttle, especially since we've noted on many occasions that the current supercharged S5 could stand to be a bit more vocal out on the street.

From there, the car is painted in a special diamond black finish, and new 20-inch wheels have been added, wrapped in 245/30-series rubber up front and 295/25 low-profile treads out back. Senner has also fitted different springs and lowered the S5 by about 35 millimeters. The interior gets the standard carbon fiber trim upgrades, and the whole package is super stealth.

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