Our Manual Boost Controller is a simple mechanical and pneumatic control to allow some pressure from the waste gate actuator to escape or bleed out to the atmosphere or back into the intake system. It works as a T-fitting on the boost control line near the actuator with a small bleeder screw. The screw can be turned out to varying degrees to allow air to bleed out of the system, relieving pressure on the waste gate actuator, thus increasing boost levels. Our Boost Controllers are popular due to their negligible cost compared to other devices that may offer the same power increase. Made of high quality anodized construction for high strength and durability. High quality 1-30 PSI adjustable automotive turbo controller. Precision CNC machined design with smooth body and stable and reliable performance. Easy to install, screws out at various levels to allow air to escape from the system, relieving pressure on the wastegate actuator and increasing boost levels. Our Manual Booster Controller is a simple mechanical and pneumatic control unit with precise design and simple operation. ASIN B01EXXSCJU Brand DNA MOTORING Model BC-GD Exterior Natural Item Weight 8.6 ounces Manufacturer DNA MOTORING Item model number BC-GD Package Dimensions 5 x 4.37 x 1.73 inches Manufacturer Part Number BC-GD