... built in Turbo Timer and switching system. This electronic boost controller unit contains control unit, mounting bracket, solenoid valve, mounting screws ... 2 harness, turbo timer harness, vaccum tube, Y fitting and filter. Also, there is an 58-page instruction booklet. This unit ... , or in dash pockets.Since this unit contains a Boost Controller, Turbo Timer, and Switching device, each must be wired ...