
German tuner adds its own G-POWER SK II "Sporty Drive" supercharger kit and an all-titanium exhaust system for an extra 185 PS / 136 kW and 190 Nm of torque.[...]
Source:
worldcarfans
https://www.tuning-links.com/news_1755_BMW+M3+GTS+by+G-Power+announced+with+635hp.html