While I'm all in favor of protecting Intellectual Property, Trademarks, and the like, I am confused by the data on file at the patent office. While I'm no trademark expert, a search at the trademark office provides the following.
Daytona - a common trademark. Not currently used as a trademark for a car
Shelby Daytona Coupe - an abandoned trademark. Abandoned in 1996. Even when it was in effect; "NO CLAIM IS MADE TO THE EXCLUSIVE RIGHT TO USE "DAYTONA COUPE" APART FROM THE MARK AS SHOWN" (mark was not shown in filing)
http://tess2.uspto.gov/bin/showfield...ate=j7pasa.8.2
Daytona Coupe - an abandoned trademark
http://tess2.uspto.gov/bin/showfield...te=j7pasa.13.1
Cobra - a common trademark. Not currently used as a trademark for a car. At least I couldn't find it.
http://tess2.uspto.gov/bin/showfield...h=Submit+Query