The Dual Solenoid Boost Controller Spec S (DSBC Spec S) has four programmable boost settings or various levels of boost. This unit features a built-in boost gauge, peak boost display, four different boost settings, boost warning, scramble boost, and a boost limiter safety feature to prevent over boosting. The DSBC Spec S uses a single solenoid design for better boost response. The DSBC Spec S is 1/4 din in size and is compatible with internal actuators and external wastegates. This unit is available in a silver case with an green LCD display. The difference between the DSBC Spec R and Spec S is the solenoid design. Spec R uses dual solenoid while the Spec S uses a single solenoid design.