Parts Geek - For 2010 Chrysler 300 Radiator Cap API 74875YK 2.7L V6. 2010 Chrysler 300 2.7L V6. Notes: Radiator Cap -- Safety Lever; 16 lb. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.