Boost Reference Adapter – VW Golf GTI/R Mk7 – BlackTurbosmart's Boost Reference Adapters (BRAs) allow access to a reliable boost reference, without compromising the operation of the car's standard sensors and control systems. The BRA attaches between the vehicle's MAP sensor and the intake manifold, providing a pressure source to a vacuum port, while still allowing full, uninterrupted pressure to the MAP sensor. The single port can be used to run a wide variety of accessories such as boost gauges and