A Turbosmart GBCV will allow boost pressure to be adjusted above the standard setting. To avoid using un-reliable methods of increasing Boost; such as shortening the actuator rod. This causes spring bind in the actuator and restricts flow through the wastegate. It avoids having to replace wastegate springs; which only give a fixed increase; which is not adjustable. Why choose a Turbosmart GBCV? All our GBCV's feature the Gated System - unique to Turbosmart. This delays the pressure signal from entering the wastegate; which in turn spools up the turbo faster; resulting in more boost at lower RPM. Setting the desired boost pressure is made easy. Simply adjust the Boost Dial on the top of the unit; without the need for any tools. Turbosmart Boost controllers are capable of increasing boost pressure to the threshold of your turbo's capacity. All Turbosmart GBCV's can be locked to prevent tampering All Turbosmart GBCV's come with comprehensive This controller comes in a black finish - a true undercover look.