Mark Martin Race Day Car Flag Savor the adrenaline of Race Day with officially licensed Mark Martin Race Day Car Flags from the ultimate sports store! Show your Mark Martin devotion with authentic Nascar Race Day Flags featuring Mark Martin Auto and Tailgating Flags. Nascar fans, score your new Mark Martin Race Day Car Flag from our Nascar Shop and receive your new Mark Martin Gear in time for the next big race. Go Mr. Consistency!