To increase power output, Vorsteiner has created two different stages, but specifics have yet to be revealed. What we do know is that Stage II is ready to pump out up to 620 horsepower.
Here is a list of the M3 GTRS3 “Candy Cane” upgrades:
2011 BMW M3 Coupe
Vorsteiner GTRS3 Carbon Fiber Wide body Conversion