I bought them as a pair. My original AC wheel bearing lasted about 170,000, the other was still going strong. But since I got them in pairs, which saved money and a possible replacement, I just did both. I would like to warn you that the brake shield is very rusty and can stick to the bearing. They no longer make these baseplates. I had to do a lot of research and get them from another company that doesn't make them, but I've had a few pairs. They are, but only if you can find them. I would recommend doing your best to save and sand and paint your slab.
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