KTM has made a supercar version of its X-Bow track toy, and it's not messing around. The hardtop gets an Audi-sourced 2.5 TFSI turbocharged inline-five engine that's good for nearly 500 horses and 429 lb-ft of torque mated to a seven-speed dual-clutch automatic transmission. 0-62 mph comes in 3.4 seconds with a top speed of |