Product Description for Boost Pressure Control Valve Enhance your vehicle's turbo performance with our reliable Boost Pressure Control Valve. Designed for optimal efficiency and power boost, this control valve is essential for improving your engine's output and performance. Explore the features that make this product an indispensable upgrade for your vehicle: Precise Fitment This boost pressure control valve is specifically engineered as a replacement for Vauxhall Astra G models (19982004) with Z20LET engines, and Vauxhall Astra H models (20042009) with Z20LEL, Z20LER, and Z20LEH engines. Verify compatibility with your specific model to ensure seamless integration and performance. Part Number Compatibility The control valve references part numbers 55557806, 55352099, and 5850129. Please confirm these part numbers match your existing component before purchasing to ensure proper fit and functionality. Basic Operating Principles This valve works by compressing air to increase the air intake, utilizing the engine's exhaust gas inertia to drive the turbine, and consequently boosting the engine's output. Experience enhanced engine performance and efficiency with this advanced control valve. Durable Construction Made from high-quality ABS material, this boost pressure control valve is built for hardness, rust resistance, and durability. Its robust construction ensures it is not easy to deform, providing long-lasting and reliable performance. Simple Installation Designed for straightforward installation, this valve offers a direct replacement for old or damaged units with no modification required. Enjoy the convenience of easy installation and immediate performance improvements. Upgrade your vehicle's turbo system with our Boost Pressure Control Valve for enhanced engine output and efficiency. With its precise fitment, durable construction, and easy installation, this valve is essential for maximizing your vehicle's performance. Order now to experience the benefits of increased power and reliability!