i am very hard on mine, have had no trouble.
i don't believe the rear bar holds any of the
cars weight at all.
the most pressure is put on the bar, with
very hard cornering, as it fights to keep
the body from leaning, by keeping it's 2
ends aligned.
i hit a pot hole while going around a
corner at an autocross level, all tires
in a drift, i too was concerned about the rear bar,
after inspection, one of my top bolts was slightly bent,
i replaced it.
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