REPLACING BOOSTER BLOWOFF VALVE
Detach air hoses (1 and 2).

Detach vacuum hoses (3 ... 5).
Installation:
3 black blowoff valve/blue elec. switching valve
4 white blowoff valve/white elec. switching valve
5 blue blowoff valve/blue elec. switching valve
(also refer to hose layout plan)
Detach blowoff valve at holder.