SANTA ANA, California — California tuner Vorsteiner joins the parade of tuning houses tweaking the menacing . In naming terms, it leads the parade with the moniker Black Widow.Vorsteiner's Black Widow coupe sports more carbon fiber than the average racing car — appropriate for a car with factory specs that include a 507-horsepower V8 and a top speed in excess of 200 mph.Inspired by the Mercedes DTM racing cars, Vorsteiner fits a carbon-fiber front spoiler as well as a larger replacement for the AMG-supplied deck lid spoiler, both of which contribute to increased downforce at high speeds.Vorsteiner says the new spoilers bolt onto the car with no additional modifications.What this means to you: Look for a new package of engine modifications shortly, as the next step for the Black Widow. — Paul Lienert, Correspondent