AEM 30-4351 75 PSIA or 5 Bar Upgrade Kit for Tru-Boost Controller Gauge AEM30-4351 Two user selectable boost settings with peak boost memory User selectable Overboost alarm includes two timed shutdown levels at 10% and 20% Overboost No external interface required for programming! User configurable gauge includes 24 scalable LEDs, and interchangeable bezel, pin guide and faceplate to customize look of display