9ff BT2 based on 997 GT2 packs 850hp

German tuners 9ff have released a new tuning package for the Porsche GT2, advancing on their previous design. The new 9ff BT2 (bi-turbo 2) gives the driver access to a ridiculous amount of power: 850 horsepower, and a maximum 920 Nm of torque.Perhaps this will send American tuning company Switzer Performance back to the drawing board. That company released an 800 hp GT2 package just a few days