Formula Holden

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Formula Holden is the top open wheel racing category in Australia. It is based on 3.8 litre (3.6 litre from 2005) V6 Holden engines mounted in ex-Formula 3000-class chassis (almost always from Japan). It was the category that awarded the CAMS Gold Star and Australian Driver's Championship. From 2005 the Gold Star has moved to Australian Formula Three. The drivers in the series tend to be a mix of older drivers who own their own cars, or very young Oceanic or South Asian drivers looking to make a name for themselves in the international scene. Although technically using cars and engines just a step below Formula One, the lack of competition in the series means that drivers tend to progress from Formula 4000 to a minor series in Europe (Will Power, British Formula 3) or North America (Scott Dixon, Indy Lights).

Originally, the class was known as Formula Brabham, and from the 2003 season is now officially called "Formula 4000 powered by Holden". It is the historic successor to Australian Formula Pacific and Formula 5000 racing.

The formula was also used for a 1993 Pan-Pacific series, several New Zealand Grands Prix, and Tasman Cup (Australia versus New Zealand) summer series. It has also been proposed to be used for an Asian series based in China. In 2006, the category was run as part of the Australian Motor Racing Series under the sanctioning of the Australian Auto-Sport Alliance (AASA) and at times the regular Formula 4000 field was complemented by vehicles competing in the new Oz BOSS category for open wheel racing cars.