2019 IHRA Rulebook

IHRA 29 13.50 and slower 1/4 mile 9.00 and slower 1/8 mile In addition to the following rules, also see IHRA E.T. Bracket Safety and General Rules. Dragsters and Altereds prohibited in this section. BODY : Must be full bodied car. BRAKES: Four-wheel brakes mandatory. DRIVELINE: Drive shaft loop mandatory on any vehicle using racing slicks. See General Regulations. DRIVER: Must remain in stock location. ENGINE: Automotive engine only. Must remain in OEM location. EXHAUST SYSTEM: Headers permitted, must be designed to route exhaust gases away from car. Flex pipe prohibited. FIREWALL: OEM type mandatory. FLOOR: Full floor mandatory. FUEL SYSTEM: One stock location fuel tank maximum. Fuel cells recommended. Top of fuel tank not to be higher than top of tires. HELMET: SN, SA, M or K-2005 or newer mandatory on all entries running 13.99 (8.59 1/8th mile) or quicker. Entries running 14.00 (8.60 1/8th mile) & slower, helmet is recommended. HOOD: See General Regulations MASTER CUTOFF: See General Regulations. ROLL BAR: Recommended. See General Regulations. STEERING: Steering box location optional. Steering must be located in conventional location on driver’s side of car. TRANSMISSION: Any OEM type transmission permitted. Neutral safety switch required. WHEELBASE: Minimum: 90” unless car has original engine and OEM is shorter. Wheelbase variation left to right: 1” maximum. WHEELS & TIRES: Must be automotive-type wheels suitable for street use. Racing slicks permitted. Automotive wire wheels or motorcycle wheels prohibited. Minimum wheel size is 13” unless originally equipped with smaller wheels and is using the original engine. Recap tires prohibited.