Flamboyant General Motors Corp. Vice Chairman Bob Lutz, who said last week that there is "turmoil and change" in GM's future product lineup, has killed plans for the Buick Bengal, a roadster that drew widespread praise when it was unveiled as a concept car earlier this year, industry sources said Dec. 19. The Bengal, inspired by golfer and Buick spokesman Tiger Woods, was the latest in a number of concept vehicles from Buick that were touted as part of GM's plans to turn around the struggling brand. The sporty Bengal, which featured a small third door on the driver side, faced too many potential production problems and escalating cost estimates, according to a Dec. 19 report on the automotive Web site TheCarConnection.com.