1. Main switch panel
Contains switches for starter, ignition and cooling fans.
2. Tachometer
Monitors revolutions per minute (RPMs) of engine, assisting driver in selecting gears and monitoring engine power.
3. Engine gauge cluster
Monitors engine oil pressure, water temperature, oil temperature, voltage and fuel pressure.
4. Auxiliary switches
Can serve a number of purposes, including turning on the backup ignition system, ventilating fans or helmet cooling system.
5. Master switch
Shuts down electrical system in emergency situations.
6. Ignition kill switch
Shuts off engine in emergency situations.
7. Radio button
Controls communication to pits and race spotter
8. Gearshift
Controls four-speed manual transmission.
9. Safety seat
Provides extra support and protection for head, shoulders, ribs and lower extremities.
10. Head and neck restraint
NASCAR mandates the use of a head-and-neck restraint system, the approved HANS Device.
11. Window net
Keeps driver's left arm inside the car during accidents.
12. Rear view mirror
13. Fresh air vent
Directs outside air into the driving compartment.
14. Main rear view mirror
15. Fire extinguisher
16. Seat belt harness
17. Fire extinguisher switch
Discharges fire-suppressing chemicals into the driving compartment.
18. Fire extinguisher discharge nozzle
19. Helmet hook
Source: NASCAR