SUPER PRO RULES 1. 9.00 max dail in 2. Stutter Boxes, Timed Down Track Throttle Stops, and Wheel Pickup Sensing Devices are prohibited. MSD 7731 ARC module PROHIBITED 3. All cars must meet general safety requirements as per the IHRA rule book. 4. All cars have to have a hood or breather. 5. Delay Boxes, Trans Brakes, Two Steps, and Playback Tachometers are permitted. Air throttles used as launch control devices are permitted. Factory (OEM) installed computers are permitted, but lap top computers are not allowed while in competition.