The controller includes everything you need, including an onboard 29 psi pressure sensor, built-in Overboost protection with two timed shutdown levels, a scramble boost setting and a low-side output for a warning light. The included boost control solenoid is the only one specifically manufactured for automotive boost applications, which means it won't corrode and stick from exposure to rich fuel mixtures (it is pressure tested to 100 psi and includes -4AN fittings to eliminate any chance of leaks).