really depends on the track. some will tell you cage, 5 points, fire suit, neck brace, helmet, fire shoes, DS safety loop, external fuel cutoff, parachute, ejection seat, and traction control. <----last two were just thrown in there.
others will say if your car was built to handle the speed they are more forgiving, vipers will run 10s pretty easily with not too many mods. the track I will be frequenting said as long as it's test and tune, they will let me run a 9.00 in my GTS with just a helmet and neck brace, although I already have halfshaft and driveshaft safety loops. I would likely stick a set of 5 points in my car just because once I get her on the track again.
98 GTS RSI TT -proline 510 6766s Infinity GG.
1007RWHP / 1049 RWTQ @ 15 psi. - SOLD