bar must pass from between the drivers shoulder and elbow. theres a few diff theorys on cages, if you want race go moly. It is NOT for the street...too brittle. also what are your ultimate goals? you may want to go with a bigger cage then you need now so you dont have to have it modified later when you go faster.
is it just me or do all the nhra legal roll cages dig into your shoulders though. i know its suppose to go from shoulders on down, but you end up having it dig into your arm. thats no fun for the street. are there options???
From NHRA rulebook, (Bar photo attached at bottom.)
“When do I need a roll bar or roll cage, and what should it look like?
A roll bar is required in any convertible running 13.99 seconds or quicker in the quarter mile, and in other cars beginning at 11.99. The roll bar is accepted in vehicles running as quick as 10.00 second e.t., provided the stock firewall and floorboard is intact, other than for installation of wheel tubs. The rollbar must be constructed of minimum 1 ¾ inch o.d. x .118 inch wall mild steel tubing, or 1 ¾ x .083 chrome moly tubing, and must conform to the following diagram:
If the floor and/or firewall has been modified, then a full roll cage is required beginning at a 10.99 e.t. A full roll cage is required in any vehicle running 9.99 seconds or quicker, and any vehicle running 135 mph or faster (regardless of e.t.). The roll cage must be constructed of minimum 1 5/8 o.d.x .118 mild steel tubing, or 1 5/8 x .083 chrome moly tubing, and must conform to the following diagram:
The roll cage of any vehicle running 9.99 or quicker, or 135 mph or faster, must also be certified by NHRA every 3 years, and have a serialized sticker affixed prior to participation.”
i think what i am going to do is get a autopower 4pt road race bar, and have some custom removable swing outs added on to it. that way it would be legal when i went to the track by could be removed for around the town driving.