Group N Touring Cars is an Australian motor racing category for touring cars built before December 1972.

The category was introduced in 1981 and was initially known as Group N (Appendix J) Saloon Cars (Pre 1965). Cars had to be series production type saloons with seating for four, manufactured prior to 31 December 1964, of which at least 100 had been produced. Mechanical modifications were permitted with the intention of emulating racing under the Appendix J regulations which were current in Australia until 31 December 1964.

The eligibilty criteria was amended in 1995 to include cars built up to 31 December 1972.

Group N is currently divided into three classes.

Individual cars are not required to have a competition history in order to be eligible.

Touring car racing is a general term for a number of distinct auto racing competitions in heavily-modified street cars. It is notably popular in Argentina, Australia, Brazil, Germany, Japan, Scandinavia and Britain.

Whilst not nearly as fast as Formula One, the similarity of the cars both to each other and to fans' own vehicles makes for entertaining, well-supported racing. The lesser impact of aerodynamics also means that following cars have a much easier time of passing than F1, and the more substantial bodies of the cars makes the occasional nudging for overtaking much more acceptable as part of racing.

As well as short "sprint" races, many touring car series include one or more endurance races, which last anything from 3 to 24 hours and are a test of reliability and pit crews as much as car and driver speed.

While rules vary from country to country, most series require that the competitors start with a standard body shell, but virtually every other component may be allowed to be heavily modified for racing, including engines, suspension, brakes, wheels and tires. Aerodynamic aids are sometimes added to the front and rear of the cars. Regulations are usually designed to limit costs by banning some of the more exotic technologies available (for instance, many series insist on a "control tyre" that all competitors must use) and keep the racing close (sometimes by ballast weight where winning a race requires the winner's car to be heavier for subsequent races).