The Pierburg Turbocharger Boost Solenoid Kit - 474011 is a comprehensive package of products designed to improve the performance of a car's turbocharger system. It includes four essential components: a boost solenoid, a gasket, a mounting bracket, and a vacuum hose. These parts work together to regulate the amount of boost pressure in the turbocharger, ensuring optimal engine performance and efficiency. The boost solenoid controls the flow of air into the turbocharger, while the gasket provides a secure seal between the solenoid and the engine. The mounting bracket allows for easy installation of the solenoid, and the vacuum hose connects the solenoid to the engine's vacuum system. This kit is a must-have for any car owner looking to enhance their vehicle's turbocharged engine.