2019 IHRA Rulebook

28 IHRA of manufacture. See General Regulations. FIRE EXTINGUISHERS: Properly secured fire extinguisher is required on all closed body cars. FLYWHEEL/CLUTCH: SFI 6.1. Flywheel shield, mandatory and clutch, pressure plate and flywheel meeting SFI 1.1 FLEX PLATE: SFI 29.1 mandatory if vehicle exceeds 135 mph. FRAME: See General Regulations. FUEL SYSTEM: Gasoline, alcohol and propane accepted. All fuel tank filler necks located inside trunk must have filler neck vented to outside of body. All batteries, fuel lines, fuel pumps or filler necks located inside trunk must be isolated from the driver’s compartment gas lines must be located outside driver’s compartment. Fuel tanks not to be higher than top of rear tires. Fuel cell recommended. HARMONIC BALANCER: SFI 18.1 balancer required on entries running 10.99 and quicker or 6.99 and quicker 1/8 mile. HELMET: SN, SA, M or K-2010 or newer mandatory. MASTER CUTOFF: See General Regulations. PROTECTIVE CLOTHING: Minimum, SFI 3.2A-5 jacket on open bodied entries. Minimum 3.2A-1 jacket on closed body entries. Arm restraints are required on all open bodied cars. Minimum SFI 3.3-1 gloves on open bodied entries. ROLL CAGE/ROLL BAR: Roll cage is mandatory if entry has an altered floor or firewall, or if vehicle exceeds 135 mph. Roll bar mandatory in all cars (including T-tops) running 10.00 to 11.49 ¼ mile or 6.50 to 7.35 1/8 mile, in convertibles running 11.00 to 13.49 ¼ mile or 7.00 to 8.25 1/8 mile and in all dune-buggy-type vehicles running 12.00 seconds and slower ¼ mile or 7.50 1/8 mile. TRANSMISSION SHIELD: SFI 4.1 mandatory on all automatic transmissions equipped entries running 10.99 and quicker 1/4 mile or 6.99 and quicker 1/8 mile. WHEELBASE: Minimum 85” unless OEM was less and vehicle is equipped with original engine. Minimum of 125 “ on dragsters, if permitted. Wheelbase variation, left to right 1” maximum. 11.50 to 13.49 1/4 mile 7.50 to 9.00 1/8 mile In addition to the following rules, also see IHRA Summit Sportsman Safety and General Rules. Dragsters are prohibited in this section. BODY: Mandatory. BRAKES: Required. Minimum of 2 rear wheel brakes required. DRIVELINE: Driveshaft loop mandatory on any vehicle which uses racing slicks. DRIVER: Must be in stock location. Driver’s seat may be moved a maximum of 10” rearward. FENDERS: Exact duplicates of stock fenders in fiberglass permitted. Rear fenders may be trimmed for tire clearance. All fenders must have the edge re-rolled or beaded if altered. FRONT OVER HANG: No item or equipment may be added to the front which will add to the overall length of the vehicle. FUEL SYSTEM: Gasoline, alcohol and propane accepted. Tank must be vented to outside of vehicle. Gas line must be located outside driver’s compartment. HELMET: SN, SA, M or K-2005 or newer mandatory. HOOD: See General Regulations. MASTER CUTOFF: See General Regulations. ROLL BAR/ROLL CAGE: A minimum of a 6 point roll bar is mandatory on all convertibles running 11.OO to 13.49 1/4 mile and 8.25 or quicker 1/8 mile. A roll cage is mandatory on any entry that exceeds 135 mph. See General Regulations. STREET EQUIPMENT: One working tail light required. TRANSMISSION SHIELD: Automatic: It is recommended that cars with modified automatic transmissions, or converters, have a transmission blanket or shield meeting SFI 4.1. WHEELBASE: Minimum 85” unless OEM was less and vehicle is equipped with original engine. Wheelbase variation, left to right 1” maximum. WINDSHIELD/WINDOWS: Windows may be replaced with 1/8” minimum Lexan. Windshields and windows must be clear except for factory-tinted safety glass. Windows must be closed during competition, need not be operable.