NHRA metal line ?

And every TECH inspector is different.Some are tough nuts, some hardly look at anything.
I came back to edit, I truly believe in doing what is right and SAFE for all.Just because a tech guy is lax doesn't mean we should be.
Case in point, I was running in a $25,000 bracket race with a 13 second car. One of the slowest cars in the field. During tech I was asked if I had a helmet. I replied no, don't need one with a 13 second car. The tech guy responded, I would. Remember these guys are chasing you,some running 8.0's over 150 mph.That's like someone behind you shooting bullets and you assume they have good aim...
I use a helmet form that day forward.