A radiator comb is a small device which is used to clean and realign the small fins on a vehicles radiator. Most radiator combs come with an assortment of brushes to fit different radiator designs.

The brushes of a radiator comb can be used to straighten the fins of the radiator which are sometimes crushed during minor gravel strikes. Once straightened and cleaned the radiator can function better as the airflow is uninterrupted.