A roll bar(6 pt.) is a very good idea if you're going to the track often. I have seen 13 sec. cars roll at the track as well. A roll bar will definitely help with chassis flex, sub-frames will not do it alone. But the do help. If you're planning the 11 sec. zone you'll need at least a 6 pt. bar anyways. If you install an 8pt. you'll be good down into the 10's. Those Tech. guys will look your car over pretty good in the lanes. They'll tell you what you need and don't need when it comes to your bar. If you know somebody with a N.H.R.A. rulebook, it'll tell you everything you need to know about how to build your bar. I recommend also to just buy the bar from S&W, it'll be cheaper in the long run. If you do go S&W, then spend the extra $30.00 and get the 8 pt. because you know you'll want to go faster later.
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