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For street use, probably adequate, but who really knows how well they are made, and to what tolerances. As with many things automotive, you usually get what you pay for, so it is a gamble. DO you feel lucky?
I tried some really inexpensive rear hubs from Amazon for about $43 shipped each. They lasted longer than the $178 each ones from the local parts store. I don't know how long they lasted since they were still fine when I sold the car.
It is an unknown and like VetteMed said, it is a gamble.
You could get some (relatively) low mileage used ones from a corvette dismantler. Then they would be as good as factory, and probably last a long time......