Ferrari Part 3.6039.0018.3 Relief Valve Brake in Ferrari 365 GTC4 (Mechanical) (Mechanical Table 030 Brake Discs, Brake Lines)

Ferrari part number 3.6039.0018.3, RELIEF VALVE BRAKE, shown here as used in a Ferrari 365 GTC4 (Mechanical) (Mechanical Table 030 Brake Discs, Brake Lines).