OEM BOV (SVA) Pics here
The OEM BOV is called a Surge Valve Actuator or SVA. It does not blow off to the atmosphere, so BOV is a misnomer The vacuum solenoid that operates it is called the "Surge Solenoid." It is the middle one, numbered 3 mounted on the right shock tower. The valve reduces boost when vacuum is applied to it by opening a passage between the output and the input of the charge air turbine. If the vacuum line is opened, there wil be maximum boost. I thought mine was stuck so I disassembled it. Not stuck. The easiest way to remove the right bolt is to point your 10mm combination wrench straight down. Helps if it has a ratchet drive built into the box end.
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