
German tuner dials up power on the BMW 550i and converts the Z4 to an 320d Efficient Dynamics-influenced diesel-sipper.[...]
Source:
worldcarfans Tuning
https://www.tuning-links.com/news_1322_AC+Schnitzer+premieres+the+ACS5+Sport+S+and+ACS+99d+%5Bvideos%5D.html