The Porsche 911 GT2 is hardly lacking for horsepower, but the 9ff crew can never leave "good enough" alone. With a pair of V670 turbos, a 9ff custom intake manifold, headers and exhaust system with a two-stage valve that takes the engine note from raucous to profane, the 9ff GT2 puts out 670 hp and 590 lb.-ft. of torque. Zero to 62 comes up in a supercar embarrassing 3.6 seconds and 124 mph is dispatched in a scant 9.8 seconds. Naturally, the ECU has been modified to make use of the additional boost and breathing mods, while simultaneously raising the rev limiter to 7,200 rpm. The additional power is shoveled to the transmission via a single-mass flywheel and racing clutch, while a coilover suspension does its best to keep the GT2 on terra firma at all times. And if having the ability to bully ZR1s, Enzos, and Carrera GTs isn't enough, a 910 hp version is on the way.