AEM 52mm Boost Digital Gauge -30-35psi Subaru-STI easily controlled by the throttle

easily controlled by the throttle pedal:

Every inch of this intake system design has evolved from countless revisions

mounting to threaded bosses on the front radiator support

or permanent modifications

Pull-type design - sealing force increases with boost pressure

AEM 52mm Boost Digital Gauge -30-35psi Subaru-STI easily controlled by the throttleAEM's Digital Boost Display Gauges combine unsurpassed accuracy, speed and control with an easy to read digital LED interface that displays boost in 1 PSI increments, and a sweeping LED "needle" that lines the edge and moves as boost from 0 to up to 50 PSI. The boost gauge's digital readout will automatically increase and decrease in intensity due to the built in ambient light sensing photocell. AEM's digital boost gauges include a 0 5v analog output