AEM Electronics Tru-BoostX gauge-type controller kits feature an electronic boost controller that combines the simplicity of a manual boost controller with the added ease of adjusting boost levels through a gauge interface. There is no external interface required for setup and they are fully functional right out of the box. If you want more boost, press the button on the right of the gauge face, and if you want less boost, press the button on the left of the gauge face. It's that simple, and it works! The AEM Electronics Tru-BoostX gauge-type controller kits contain everything you need, including an on-board 80 psig pressure sensor, built-in overboost protection with two timed shutdown levels, a scramble boost setting, and a low-side output for a warning light. AEM includes a boost control solenoid that is the only one specifically manufactured for automotive boost applications. This means that it will not corrode and stick from exposure to rich fuel mixtures, is pressure-tested to 100 psi, and includes -4 AN fittings to eliminate any chance of leaks.