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B. A Nomex or Carbon-X head sock (balaclava) is required for drivers with long hair (or facial hair, except for small, trimmed mustaches) and recommended for everyone.

Helmet Supports/Restraints: Padded helmet supports (“horse collars”) are the minimum standard in the Auto A Division. A racing-approved head and neck restraint system (HANS, Hutchens, R3, Simpson, SRS-1 or similar) is required in the Unlimited division and highly recommended for all Auto Divisions. All HANS device users must ensure their harness mountings are in exact conformation with the device requirements. Any racer using a HANS device must coordinate with the Chief of Tech and be prepared to provide supporting documentation that their installation is in compliance with HANS requirements. All other types of head restraint systems must also be installed and used strictly in accordance with their manufacturers’ instructions.

Clothing:  A Nomex or Carbon-X fire-resistant Driving suit, shoes, socks and gloves (leather palms O.K.) are required. Treated cotton suits of any kind, i.e., Proban, will not be allowed in these divisions, regardless of any rating they may carry. A one-piece suit is recommended.

1. For the Auto A Division, either a suit meeting SFI 3-2A/1 specifications worn with Nomex or Carbon-X underwear, or a suit meeting SFI 3-2A/3, will be considered the minimum standard; and a suit meeting SFI 3-2A/5 (double-layer) or higher is highly recommended. 
    
2. For Unlimited, a multi-layered suit meeting SFI 3-2A/5 specifications worn with Nomex or Carbon-X underwear is the minimum standard.

Window Nets: Required for any closed cockpit vehicle without glass or Lexan window covering.

GENERAL WHEEL AND TIRE REQUIREMENTS

1. Load Carrying Capacity:  All tires must have an equal or greater load carrying capacity than the original tire.  (Example: Suppose the base tire for a 1999 Mustang is a P205/65R15 rated @ 1400 lbs. Any replacement tire must therefore have a load rating of at least 1400 lbs., regardless of the speed rating or Division/Class in which the vehicle is competing. Modern tires use a “load index” number but the concept is the same.)
    
2. Speed Rating:  The vehicle must be equipped with tires having a speed rating equal to or better than the OEM specification of the vehicle to compete in any division.
    
3. DOT Drag Radials, or DOT radial road racing tires, which may or may not have a speed rating, may be used if the load rating rule is observed. Use of any non-DOT tire, or non-radial car tire, must be cleared first with MKM or the Tech Inspectors. Generally, non-DOT or non-radial Drag Racing tires are unacceptable.
    
4. All DOT tires used on 4-wheeled vehicles are required to be radials. Radial and non-radial tires shall not be mixed on the same vehicle, including motorcycles.
    
5. In any class, tires or wheels may not rub on any part of the suspension, frame, or bodywork.
    
6. Cosmetic hub caps, wheel covers and “beauty rings” that are not bolted on, must be removed.
    
7. Prohibited for 4-wheeled vehicles: Drag Slicks; narrow “drag race” front tires; wire wheels; wheels larger than 20 inches in diameter (unless factory-equipped, and designed for the speeds expected); tires larger than 30 inches in diameter (exception: 33 inch diameter allowed for ¾ ton or larger trucks/SUVs). Prohibited for motorcycles: Drag slicks; rear tires of greater than 240 section width; front tires that are less than half the section width of the rear tire.