Radiator Cap 18-22 PSI W/Lever

The Radiator Cap 18-22 PSI W/Lever by ALLSTAR PERFORMANCE is a pressure-relief cooling system component designed for high-performance and racing applications where engine temperature control is critical. Built to fit standard-size radiator necks, this lever-operated cap regulates coolant pressure to maintain optimal operating temperatures under demanding conditions. Whether you're running a street machine, competition vehicle, or specialized motorsports build, a properly functioning radiator cap is essential to preventing coolant boil-over and protecting your engine block from catastrophic thermal failure.

This cap is engineered to hold 18–22 PSI of system pressure, a rating that increases the boiling point of your coolant and improves heat transfer efficiency throughout the engine block and radiator core. The integrated lever mechanism allows quick removal and installation without specialized tools, simplifying coolant checks and maintenance in the field or garage. The round design with lever handle is compatible with traditional radiator neck configurations, making it an ideal replacement or upgrade for vintage builds, restorations, and performance cooling systems where factory caps fall short under sustained high-load operation.

Mechanics, restoration specialists, and racing teams rely on this cap to maintain system integrity during extended track sessions, towing, or spirited driving where stock cooling systems struggle. Installation is straightforward—simply remove the old cap and thread this unit onto the radiator neck until hand-tight, then verify the lever locks securely. This radiator cap is a cost-effective reliability upgrade for anyone serious about engine protection and cooling system performance.