Not sure if it’s still that way but a track can require it. My son Matt was required to put one on years ago. His car ran 6.54 and Greg told him to put one on, so he did. Honestly it a great rule and my save your car someday.
I'm sure it definitely a good thing. How's the one Greg sale's? I would have to get a heat resistant one because my passenger side header is basically against the oil pan.
