German tuners Racing Dynamics have released their initial plans for tuning the next-gen BMW 5-Series F10. The company plans to give performance and aero modifications to both the 2011 550i and the 535i. The twin-turbo V8 used in the 550i will be boosted by a staggering 52% to 620-horsepower. With this kind of power, performance brakes with discs capable of 800 degrees Celsius will definitely be used, as will a sport-suspension and rear-locking differential. An increase in torque was not disclosed for this engine, but speed will top out at 340 km/h (211.2 mph) according to BMWblog.com. A 34% horsepower increase will be given to the 535i, bringing output up to 410-horsepower and a beefy 530 Nm of torque. This could allow for a 0-100 km/h time of 5.3 seconds. The stock 535i hits 100 km/h in 6.0. Outside, the included rendering shows a car with a new rear diffuser incorporating quad-exhaust pipes. Sidesills look to be boxier than the originals. Light, 21-inch one-piece wheels have been confirmed. Inside, the company promises a carbon fiber trim offered in different colors. Wood trim will also be offered.