Here's a question, though. I replaced mine, and didn't notice any "arrow" on my aftermarket T-stat. In fact, Im not 100% sure which direction I put the thing in, at. I know the 'stat is orientated properly, just not sure if it's "facing" the correct rotation. Does this really matter? The car is running at peak performance, 82-90C.. so I'm guessing I have it right anyway.

Does that arrow really mean anything? If so.. did I just get lucky?