| Category | Kart racing |
|---|---|
| Region | International |
| Inaugural season | 1981 |
| Drivers' champion |  Ethan Jeff-Hall(World, 2024) Joe Turney(European, 2024) |
| Teams' champion |  CRG-IAME(World, 2024) Kart Republic-IAME(European, 2024) |
| Official website | FIA Karting |
Original Kart, commonly abbreviated as OK, is a kart racing class for drivers aged 14 and over, sanctioned by the CIK-FIA. OK is the primary direct-drive class in FIA championships.
The class was originally called Intercontinental A (ICA), first introduced in 1981 at the European Championship as a secondary direct-drive class to Formula K. The class was first contested at the World Cup in 2006. In 2007—after 26 seasons of racing—ICA was replaced by KF2 and became the primary class in 2010, replacing KF1 at the World Championship. The KF2 class was renamed to KF upon the demise of KF1 in 2013, and was replaced by Original Kart (OK) regulations in 2016.
OK is currently contested as the primary direct-drive class at the Karting World Championship and the Karting European Championship.