OCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”> The original Cadillac CTS-V was tested on a variety of different tracks, including Germany’s Nurburgring, as well as Road America in Elkhart Lake, WI. Fifteen years after Cadillac introduced its first V-Series model, two more performance offerings are set to make their debut next week, the automaker has confirmed. What’s unusual about the coming news is that Caddy will use a preview in Detroit to reveal the all-new CT4 sedan in V-Series trim first, with the base model set to follow later, reversing its normal approach. The event also will see the introduction of a V-version of Caddy’s mid-range sedan, the new CT5-V, that effectively replaces the old CTS-V that kicked off the performance program when it debuted in 2004. “From the very beginning, Cadillac’s V-Series represented the ultimate expression of our design, technology and performance,” said GM President Mark Reuss, ahead of the two introductions. “It introduced an entirely new breed of performance-minded customers to Cadillac showrooms and helped transform the brand’s tra...