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    • NHRA E.T. Quick Reference Chart
    Quarter-Mile e.t.s 6.00 to 7.49 7.50 to 9.99 10.00 to 10.99 11.00 to 11.49 11.50 to 13.99 14.00 & Slower
    Aftermarket Rear Axles Y Y Y 2:11 2:11 2:11
    Arm Restraints
    (Open Cars)    		 Y Y Y Y 10:3
    11.99    		 10:3
    Auto Trans Flexplate
    (SFI 29.1)    		 Y Y 2:14 2:14 2:14 2:14
    Auto Trans Reverse Lockout Y Y Y Y Y Y
    Bellhousing
    (SFI 6.1/6.2)    		 Y Y Y Y 2:10 2:10
    Driver Restraint System
    (SFI 16.1)    		 Y Y Y
    10:5    		 Y
    10:5    		 C
    10:5    		 10:5
    10:11
    Driveshaft Loop Y Y Y Y 2:4 2:4
    Electric 16.00 & Quicker Y Y Y Y Y 2:4
    Flexplate Shield
    (SFI 30.1)    		 Y Y 2:14 2:14 2:14 2:14
    Flywheel/Clutch
    (SFI 1.1/1.2)    		 Y Y Y Y 2:5 2:5
    Harmonic Balancer
    (SFI 18.1)    		 Y Y Y Permitted Permitted Permitted
    Helmet
    (Snell 95 or SFI 41.1A min.)    		 Y Y Y Y Y 10:7
    Liquid Overflow Y Y Y Y Y Y
    Master Electrical Cutoff Y Y 8:4
    135 mph    		 8:4 8:4 8:4
    Neck Collar Y Y 10:8 10:8 10:8 10:8
    NHRA Competition License Y Y 10:4 10:4 10:4 10:4
    NHRA Chassis Sticker Y Y 4:4 4:4 4:4 4:4
    Padding Roll Bar/Cage Y
    SFI    		 Y Y Y 10:6
    135 mph    		 10:6
    135 mph
    Parachute Y Y 4:8
    150 mph    		 4:8 4:8 4:8
    Pressurized Bottles
    DOT (1800)    		 Y Y Y Y Y Y
    Protective Clothing Y Y Y Y 10:10 10:10
    Roll Bar     Y Y C/13:49 4:10
    Roll Cage Y Y
    135 mph    		 4:11 4:11 4:11 4:11
    SFI Chassis Specification Y 4:4
    180 mph    		 4:4 4:4 4:4 4:4
    Supercharger Restraints Y 1:15 1:15 1:15 1:15 1:15
    Taillight Y Y Y Y Y Y
    Transmission Shield
    (SFI 4.1)    		 Y Y Y 2:14 2:14 2:14
    Window Net
    (Full-Bodied Cars)     		Y Y 6:3
    10:3    		 6:3
    10:3    		 6:3
    10:3    		 6:3
    10:3
    Y = Required C= Convertibles
    Number Refers to General Regulations
    In no way is this Quick Reference Chart intended to supersede or replace the current NHRA Rulebook
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