Kitchener, ON – After a successful first season of operation with its Alcohol Funny Car Series presented by Ohsweken Speedway, the National Drag Racing Association (NDRA) is proud to announce the addition of a Pro … The NDRA Pro Doorslammer class will feature six-second, 200 mph plus door cars with unique body styles and engine combinations, providing fans with a throwback feel, reminiscent of the early days of Pro Modified and Quick 8 competition.