The Bosch Fuel Injector Kit - 140664 is a comprehensive kit of products designed for use in a car's fuel injection system. It includes three essential components that work together to ensure proper fuel delivery and efficient engine performance. The first component is a set of fuel injectors, which are responsible for spraying the correct amount of fuel into the engine's combustion chambers. The second component is a fuel pressure regulator, which helps maintain a consistent and optimal fuel pressure in the system. Lastly, the kit includes a fuel filter, which helps to remove any impurities or debris from the fuel before it reaches the injectors. This kit is essential for maintaining the proper functioning of a car's fuel system and ensuring reliable and efficient engine performance.