The Lexus IS-F is a beefed up version of the regular Lexus IS, busting out a formidable 416hp from its 5.0L direct-injected V8. That's one monstrous powerplant for a luxury sports sedan and the 371 lbs-ft of torque isn't anything to sneeze at either. Everything has been designed for high-speed cornering, so feel free to take it for a rip around the pylons. In this Fifth Gear segment, Tiff Needell takes the Lexus IS-F out for a road test.