How fast is does a car have to be before it requires a roll bar if it has t-tops?

I am thinking I will be in the high to mid 12's so I should be ok right?

 

T-top cars fall under the same rules as a hard top. 6 point roll bar required at 11.49. Roll bar is good to 10.0 unless floor or firewall is modified. Then a full cage is required. A full cage is required at 9.99 and quicker.

My car got a roll bar when I was knocking on the door of 11's. At the time 11.99 and quicker needed a roll bar. When my car got into the low 10's, I ripped out the roll bar and installed a full cage.

 

 

Check with your local track as well....my track states that t-top cars must adhere to convertible rules....this rule has been on their website for several years now so, it may have changed without them updating it.

 

NHRA tried to make the rule for T-tops the same as convertibles a couple of years ago but it was changed back before the start of the season.