[Sean Marconette]

This is the rules for ET class 2013 NHRA Rulebook


FRAME: 4



Permitted. See General Regulations 4:2.
DEFLECTOR PLATE
Mandatory on rear-engine dragsters. See General Regulations 4:3.
GROUND CLEARANCE
Minimum 3 inches from front of car to 12 inches behind centerline
of front axle, 2 inches for remainder of car, except oil pan and
headers. See General Regulations 4:5.
PARACHUTE
Mandatory on any car that runs 150 mph or faster. See General
Regulations 4:8.
ROLL BAR
Roll bar mandatory in all cars (including T-tops) running 11.00
(*7.00) to 11.49 (*7.35), in convertibles running 11.00 (*7.00) to
13.49 (*8.25), and in all dune-buggy-type vehicles running 12.00
(*7.50) seconds and slower. Permitted in all cars. See General
Regulations 4:10, 10:6.