I've been told the PSHHHHHHHHHH sound at shifts means the BOV is vented to atmosphere which apparently shouldnt be done with stock MAF setup.
Dumps metered air into the atmosphere.
causes bogging at shifts.
x2. theres a guy around here with a stock srt 4 and a bov. everytime he shifts his a/f meter goes rich. basically to me a bov mod is a ricer mod unless you actually have an aftermarket turbo. ugh turbos are so complicated.