The TRW Valve Set - 138149 is a comprehensive kit of products designed for use in a car. It includes a variety of essential components that are necessary for maintaining and repairing the car's valves. The kit contains various types of valve sets, which are responsible for controlling the flow of air and fuel into the engine. These sets are crucial for the proper functioning of the car's engine and play a significant role in maintaining its performance.

In addition to the valve sets, the kit also includes other components such as gaskets, seals, and O-rings. These parts are essential for creating a tight seal and preventing leaks, ensuring the proper functioning of the valves. The kit also includes various tools and hardware necessary for installation and maintenance, such as wrenches and bolts.

Overall, the TRW Valve Set - 138149 is a comprehensive kit that provides all the necessary components for maintaining and repairing the valves in a car. It is a convenient and cost-effective solution for ensuring the smooth operation of the engine and maximizing the car's performance.