Well, my chrome one (with O-ring) has been in use since '98 when i bought the first Longhorn...no tellin how long it was on that truck before I got it. So far so good, and I really like the O-ring too.
On the one that the holes did not line up on, it was probably a pontiac one, thy look the same, but the holes don't quite match up. Pontiac and caddy have the same hole spacing too just in case any one was losing sleep with that question.
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