New as far as I know, and rubber appears to be similar in quality, but would not swear by it. They have multiple "brand" choices and I went with the cheapest.
Rubber boots fail because they get heat cycled, contaminate by petroleum products or cut. My headers crisped mine up. Having had a factory boot in my hand, they are nothing special IMHO...
How can you tell a properly reman part from new?
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