The car tuning firm Kelleners Sport have now released another package for the BMW 5 Series M, which tunes both the 535i and 520d models. These cars will displayed at the upcoming Geneva Motor Show, and Kelleners guarantees a 20 percent gain of power for the petrol and diesel engines. For the petrol powered 535i, the power output was raised from 306 hp to 367 horsepower, with torque increased from 400 to 480 Nm. Meanwhile, the 520d diesel engine was boosted from 184 hp to 218 horsepower, and a final torque output of 450 Nm. Styling modifications for the BMW 5 Series M came next.