6 pt bar on street car

I have thought about installing a bar in my car and decided not to do it. I drive mine to the track and feel a bar requires a helmet.
I have subframes and stitch welded the rear floor seam. Car is very stiff, I'm around 400HP. Recently cracked 2 teeth on my ring gear so I figure that's my weak link.
Instead of going faster you might want to work on consistency if you bracket race.