
Having taken care of the BMW X6M with their 659PS (650HP) tune, G-Power has now turned to the other 'M' branded model of the range, the diesel-powered M50d.[...]
Source:
Carscoop
https://www.tuning-links.com/news_4743_G-Power+Finds+BMW+X6+M50d%26%23039%3Bs+Sweet+Spot+With+455+Diesel-Fueled+Horses.html