As others said they come packaged with aluminum shavings to clean I tied a string to a microfiber cloth and dealt with it fairly quickly. The hot side fits perfectly, the cold side sticks out too far from the inlet and doesn't fit my inlet. Also, a couple of the clamps were bent, but I used the factory clamps so it didn't matter. I'm actually very impressed with the quality of the boots, they look better than the stock ones but we'll see how they perform.
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