- Federation Internationale de L'Automobile, the Geneva-based governing body for worldwide motorsport. Regulates and controls all the major racing and rallying activity, except events held in the United States.
- FILL THE MIRRORS
- A driver is pressuring another driver so feverishly that the pursuer fills the rear-view mirror.
- FIRE SUIT
- Fire-resistant clothing that is required apparel for drivers as well as crewmembers and anyone else in the pits during a race.
- The person standing on the tower above the Start/Finish Line who controls the race with a series of flags.
- FLAT SPOT
- When drivers lock up brakes, they expose one area of their tires to excessive wear causing flat spots to develop. Flat spots lead to vibrations, which may require a tire stop.
- FLYING FINISH
- The finish line of a timed special stage, passed at full speed by the rally cars.
- FORMULA CAR
- Formula cars must fit within a specific set of design rules or "formula." The formulas are usually quite complex, but basic issues include minimum weight, engine displacement, vehicle dimensions, wing sizes and placement, ground-effects tunnel size and configuration, tire and wheel size, and safety considerations.
- FOUL START
- Indicated by a red light on the NHRA Christmas Tree when a car leaves the starting line before the green light, or starting signal.
- FRESH RUBBER
- A new set of tires acquired during a Pit Pass.
- FUEL CELL
- This gas tank for racecars is mostly borrowed from military applications for extra protection in crashes.
- FULL TANK PRACTICE
- Ordinarily, teams fill their fuel tanks for the last practice before a race to test handling characteristics. Before then, they practice and qualify with limited fuel to decrease weight and gain speed.
- FULL-TIME RIDE OR SEAT
- A full-time job for a driver. "He has a full-time ride (or seat) next year."