Rev9 ( Ac-008-blue ) Manual Boost Controller Universal Adjustable Racing Turbo 30psi Manual Boost Bypass Controller Kit Product Details Universal In cabin Manual Turbo Boost Controller Brand new Gated Boost Control Valve Increasing boost pressure is often the most cost effective way to increase horsepower It avoids having to replace wastegate springs, which only give a fixed increase. This allows boost pressure to be adjusted above the standard setting This method avoids using un-reliable ways of increasing boost, such as shortening the actuator rod. Which causes spring binding in the actuator and restricts flow through the wastegate. This is designed to be mounted inside the cabin and allows for boost adjustment on the run. Ideal for the active enthusiast. Control boost from the drivers seat Detent System for ease of adjustment Gated System to bring boost on faster Mounting bracket, hose and all fitting hardware supplied Comes with installation instructions