lololll there are no BoV on the AAM kit so don't waste your time there. I would definitely suggest doing some sort of vacuum/boost leak smoke test on the car though. curious do you have all of your PCV hooked up on the car? I'm assuming AAM did the install so ill venture to say yes. If it happens for as long as a minute its definitely not a turbo spooling down. exhaust gases will bring the turbo to a halt rather immediately after shutting the engine down. there is little to no "free spool" happening beyond this point. I am curious, however, if your PCV check valves could be installed backwards causing a slow "release" of the crank case pressures after the engine has stopped cranking.
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