The following is a list of major items that are required at specific ET's and speeds. This list is a guideline, and we recommend consulting a current NHRA rulebook for specific details, specifications, and diagrams.13.99 seconds (8.59 1/8th) Drive Line Loop with slicks Approved helmet (Full face in open cars) SFI 3.2A/1 Jacket in vehicles equipped with non-OEM nitrous oxide, turbochargers or superchargers 13.49 seconds (8.25 1/8th) Roll bar in convertibles SFI seat belts in convertibles 11.99 seconds (7.49 1/8th) Steel Valve Stems Arm Restraints (open cars) 11.49 seconds (7.35 1/8th) SFI 1.1 or 1.2 Flywheel / Clutch SFI 6.1, 6.2, 6.3 or 9.1 Flywheel shield SFI 3.2A/1 approved jacket Roll bar SFI approved seat belts Drive Line Loop with street tires Full Leathers on M/C, ATV and Snowmobile @ 120 MPH 10.99 seconds (6.99 1/8th) or Super Street SFI 4.1 Transmission Shield, or at 135 mph Locking transmission dipstick tube Locking transmission dipstick tube Aftermarket axles and axle retainers SFI Harmonic Balancer Roll Cage with altered floor pans, or 135 mph - Window net required Roll Cage with altered floor pans, or 135 mph - Window net required Ignition cut-off on all bikes / snowmobiles that exceed 135 mph 9.99 seconds (6.39 1/8th) or Super Gas or 135 mph NHRA Chassis Certification/li> NHRA Competition License SFI jacket & pants 3.2A/5 SFI neck collar & gloves 3.3/1 SFI 29.1 flexplate / 30.1 flexplate shield (AT equipped cars) Full Face Helmet meeting Snell or SFI specifications 150 mph Parachute