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When accelerating the bov stays closed,when you let off the gas and the throttle plate closes,like in between shifts it vents the excess boost either into the atmosphere (bov) or back into the intake (DV).A Diverter Valve is not the samething as a BOV,even though they are always called the samething.A BOV vents to the atmosphere,and a Diverter valve vents back into the intake tube.I think i got that right.
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