It's powered by a GM Performance all aluminum LS6 V8 with 671hp and built on a modified Porsche 911 GT3 drivetrain. It can go from 0 to 60 mph in 2.8 seconds and according to the seller, you can even go from 0 to 100 mph and back down to 0 in 10 seconds. Additionally, it's possible to take off from a complete stop in fifth gear. Top speed is in excess of 200 mph. Other GM components include suspension parts with four-corner coil-over shocks, and larger brakes. Just as important, the GTM is both light and aerodynamic and has excellent weight distribution and race car precise handling and braking.