HKS 45003-AK009 EVC-S Electronic Valve Controller Type-S. The EVC-S features a solenoid valve specifically designed to accurately control boost pressure up to 250kPa or 36 PSI, 2 boost level settings as well as settings for offset and boost response. Also included are: overboost warning with drop boost feature; peak hold boost readings; after-image display; data lock and an internal diagnostic function. Designed to be compatible with both internal and external wastegates, the EVC-S also complements the current HKS Turbo Timers and AF Knock Amp.