G-Power released details on their tuning kit for the BMW M5 Touring. The base model is the well-known E61 but even so, the improvements are noteworthy. Power is offered by an improved 5.0-liter V10 engine producing 820 horsepower and 790 Nm of torque, enough for a 0-100 km/h sprint in 4,4 seconds with a top [...]