How fast can you legally run with a roll bar. I haven't bought a rule book in a couple years. I heard that you can now run 9.50 et with a bar and at 9.49 et you need a cage. Is this correct?

I beleive 9.99 and quicker is the NHRA cage requirement. 10.00 and slower with a stock floorboard (except for rear wheel tubs)and firewall is the roll bar rule. Call NHRA tech to make sure NHRA did lower the ET for roll bars several years ago from 11.99 and quicker to 11.49 and quicker

10.0 then you need a cage

If you have a vert then 10.99 need a cage

2013 rule book says..this is for bracket racing.

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.

stock eliminator cars..

ROLL BARS
Mandatory in BB/S through M/S, BB/SA through M/SA, in all
convertibles and in any car running 11.49 or quicker, permitted in
slower cars. Front braces may not extend in front of firewall. Six-
point attachments permitted. Roll cage mandatory in any car
running 9.99 or quicker, permitted in slower vehicles. See General
Regulations 4:10, 4:11, 6:3.
ROLL CAGE
Mandatory in any car running 9.99 or quicker. Chassis of car
requiring a roll cage must be recertified every three years by NHRA
and have serialized sticker affixed to roll cage before participation at
any NHRA event. See General Regulations 4:11, 10:6

NHRA DRAGS: STREET LEGAL
STYLE PRESENTED BY AAA

this class..

Additionally, requirements and specifications for Street Legal are the
same as those for the Summit Racing Series with the following
exception. Unaltered 2008 OEM model-year and newer production
cars running slower than 9.99 and 135 mph do not have to meet the
requirements and specifications for the Summit Racing Series except
for the following: Convertibles and T-tops must meet Summit Racing
Series roll-bar and roll-cage requirements, All drivers must meet the
Summit Racing Series helmet and protective-clothing requirements.

the exception to the roll cage rule only applies to Street Legal Class..and 2008 newer cars..that race at a Street Legal Event..

I run a regular 6 point in my 10oh s-10 As long as you stay slower than 9.99 and 135 your ok

Yep my 63 is legal to 10.0 with my 6 point rollbar. Ron