Mishimoto MMRC-11-FRD Reservoir Cap (1.1 Bar Ford Overflow) Raises the boiling point of engine coolant to provide a safer and more efficient cooling system Ergonomically designed for easy removal and installation Installing a new cap can prevent overheating and cooling system failure Pressure Tolerance: 1.1 Bar, 16 psi, 110 kPa / Note: Replacement for Ford 9C3Z-8101-B or Motorcraft RS-527 Mishimoto Lifetime Warranty