1、To allow some pressure from the wastegate actuator to escape or bleed out to the atmosphere or back into the intake system 2、Made of high quality Aluminum alloy for maximum durability 3、Compact design, easy to use and install 4、Compared with other devices which offer the same power increase, ours are low cost and time-saving 5、1-30 PSI Pressure Adjustment Range Feature: To allow some pressure from the wastegate actuator to escape or bleed out to the atmosphere or back into the intake system. Made of high quality Aluminum alloy for maximum durability. Compact design, easy to use and install. Compared with other devices which offer the same power increase, ours are low cost and time-saving. 1-30 PSI Pressure Adjustment Range. Precise design, anti-corrosion and wear resistance. Universal fit for turbo engines. Specification: Condition: Brand new Material: Aluminum alloy Color: Black Size: As Picture Show Outlet Type: 4AN Fittings to 1/4" Hose Maximum PSI:  30 PSI Package Weight: 236g Fitment: Universal fit for turbo engines. Package List: 1 * Turbo Engine Boost Controller 1 * set Installation Accessories Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.