... :1 pc 3,Packing:20pcs/ctn 4,Color: Purple Boost control valve1,Fob price:Get latest price2,MOQ:1 pc3 ... Purple Description:Mines bleed type boost controller allows you to increase boost approximately 12psi over your wastegate boost setting. An effective and ... general more power from your engine. Mechanical Boost Controller . is a manual boost control sysytem that utilizes a pneumatic regulating valve ...