- ICE NOTES CREW
- See gravel cars.
- IMPACT GUN
- The machine used to remove wheel nuts. Also an air wrench or air gun.
- The Indianapolis Motor Speedway. Also referred to as the Brickyard.
- The International Motor Sports Association. The North American road racing sanctioning body featuring prototype GTS sports car series.
- Enclosed portion of a track, which includes team garages on most oval tracks. During race weekends, this area is usually filled with large transporters; merchandise trailers, and driver and fan motorhomes.
- INSIDE GROOVE OR LINE
- On an oval track, this is the innermost racing line, which is usually separated from the infield by a distinctly flat surface called an apron. On road courses, the inside groove refers to the line closest to the curbs or walls forming the inner portion of turns.
- Radio communication system between rally driver and co-driver (primarily for reading pace notes).
- INTERVAL TIMERS
- Part of a secondary NHRA timing system that records elapsed times, primarily for the racers' benefit, at 60, 330, 660, and 1,000 feet.
- In how many series does Ford Racing race?
- Ford Racing participates in seven major global motorsports series: NASCAR's Nextel Cup, Busch Series and Craftsman Truck Series, the Bridgestone Presents The Champ Car World Series Powered by Ford, World Rally, various National Hot Rod Association classes and Best in the Desert. Ford is also involved with regional and grass roots series.