In Australia, what is Pro Modified drag racing known as?

In Australia, Pro Modified drag racing is known as Top Doorslammer.

The name reflects the class’s defining visual feature: full-bodied sedans and coupes with functioning doors. Australian Top Doorslammers resemble production cars from makers such as Holden, Ford, Chevrolet, Dodge and Studebaker, but underneath they use purpose-built racing chassis and highly modified engines.

Top Doorslammer is regulated by the Australian National Drag Racing Association, or ANDRA, and is a professional Group 1 category. The class is broadly comparable to American Pro Modified, although the rules and terminology are not identical. Pro Mod cars may use superchargers, turbochargers or nitrous oxide, while classic Top Doorslammer descriptions emphasize large supercharged V8s running methanol or ethanol-based fuel.

The category developed from an exhibition-style “Wild Bunch” class and was formally recognized by ANDRA as a Group 1 class in 1996. “Top Doorslammer” therefore means more than a casual translation: it is Australia’s established professional category name.