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You've probably seen a lot of trucks running around with aftermarket grilles lately. Be aware! We've seen some pretty scary stuff out there that looks like it blocks more than 50 percent of the airflow into the radiator. Not enough airflow, and your cooling system will be gasping for a way to release the heat from the radiator's fins. If you do bolt on an aftermarket grille, make sure there are plenty of air passages.

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