Turbosmart BOV Controller Big Bubba Sonic Sleeper Kit (TS-0304-1009)Turbosmart's blow off valve controller kit uses a throttle position sensor and solenoid to allow a blow off valve to be fitted to turbo diesel vehicles. The Big Bubba BOV controller kit is ideal for reducing compressor surge in heavily boosted large capacity diesel engines. This kit is ideal for applications making more than 80 psi of boost.