HPS Performance 2068-40S Radiator Cap

The HPS Performance 2068-40S is a replacement radiator cap designed to maintain proper cooling system pressure. A functioning radiator cap seals the cooling system, holds the specified pressure rating to raise the coolant's boiling point, and allows coolant to flow to and from the overflow reservoir as temperatures cycle. A worn or failing cap can lead to coolant loss, overheating, or air entering the system — making this a straightforward but critical maintenance item.

Fits a wide range of vehicles spanning model years 1968–2025, with broad application coverage across Nissan, Hyundai, Kia, Mazda, INFINITI, Subaru, Toyota, Mitsubishi, Ford, Isuzu, and additional makes. Verify fitment using your vehicle's year, make, and model before ordering.