Not Ranked
I've owned two Superformance cars and have experience with many other owners these were all 5-pin drive. Never a problem with properly installed pins breaking. Some of the cars ran track tires and 600-700 hp.
I've seen replacement pins that were not machined properly, others were too long or a bit short, but no issues.
One problem that does happen is owners don't remove the wheels periodically and have the wheels seize on the pins, silver anti-seize usually solves the problem. Then some don't get the spinners tightened properly, it does take a solid hit or two with a LEAD hammer and another hit after a few miles.
I wouldn't worry about 5 or 6 pins.
Jim
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