Back in January, tuner G-Power announced they were in the process of tuning the newly launched BMW M3 GTS. Few details were released, only stating that it would produce "over 600hp." That was then. 635hp is now. Yes, the G-Power M3 GTS officially produces 635hp with 465 lb-ft of torque, up from 444hp and 325 lb-ft of torque. To make this happen, G-Power added their "Sporty Drive" supercharger system that was adapted specifically for the GTS.
They also included a lightweight, all-titanium exhaust system that's equipped with metal catalytic converters. The ECU was also reprogrammed. All told, it goes from 0 to 62 mph in just 4.2 seconds and has a top speed of 200 mph. The "standard" M3 GTS runs for an astonishing $145,280 and with the G-Power II SK supercharger system upgrades, it costs and additional $33,000 - not including tax and installation.