In the NHRA rulebook it states that ANY car which can go under 8.99 seconds MUST use an approved full roll cage.
Then in their Super Stock catagory it states that NO Super Stock Class car shall have any chassis tubing forward of the firewall.
SS/A and some SS/B cars go faster than 8.99 so, why is the rule for complete roll cages in cars 8.99 and faster even in there...?
NHRA rule book about ET and roll cages
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