The Bosch Direct Injection High Pressure Fuel Pump Kit - 472566 is a comprehensive kit designed to service a car's fuel injection system. It includes three essential components: a high pressure fuel pump, a fuel filter, and a fuel pressure regulator. These components work together to ensure that the engine receives the correct amount of fuel at the right pressure for optimal performance. The high pressure fuel pump is responsible for delivering fuel at high pressures to the fuel injectors, while the fuel filter removes any impurities from the fuel. The fuel pressure regulator is responsible for maintaining a consistent fuel pressure throughout the system. This kit is essential for ensuring the smooth and efficient operation of a car's fuel system.