Many HPDE Events or Road Course Track days require an in car Fire Extinguisher. A California company, H3R Performance, makes a racing purpose Fire Extinguisher. It is purpose built for automotive and aircraft use. Their HalGuard unit contains Halotron 1 an electrically non-conductive clean extinguishing agent that rapidly turns into a gas. Thus not making a huge mess in your car or impairing your vision. Plus its rated for oil, gas and electrical fires.
The HalGuard Extinguishers are made in the USA and have all metal parts. The cheaper extinguishers have plastic parts that can age and rot over time. These are made in the USA and come with a 5yr limited warranty, and come in at under 6lbs. The H3R Performance Class B:C extinguishers are what are called for on the types of fires likely to occur in the automotive racing environment.
They feature a nice roll bar mounting option as well as a flat surface mounting bracket. The extinguisher comes in chrome, black or red colors. This quick-release billet aluminum mounting bracket is accepted by most race-sanctioning bodies and clubs, including NHRA, IHRA, NMCA, NMRA, NSRA and MTRA.
If the HPDE, autocross, road racing event or pro-touring event you are attending requires an in car fire extinguisher then the HalGuard is the one you want.