It had no arrow on it that I remember seeing...but I think those are only on the ones with the little vent holes and this one didn't have that either. If it doesn't run any warmer in the summer than it does now I don't plan on doing anything more with it...if, for some reason it runs warmer I will pull it and look at it again to make sure I didn't miss anything during the installation.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz