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same here
Did you figure out the cause of the hissing sound? My LS is experiencing the same thing right now. No visible leaks, catch can collecting oil as it should be doing, just don't know why the noise?
To all the Pro's out there, can my recent addition of Ice-olator, ported TB, and plenum spacer be contributing factor in the hissing noise. Meaning with all the extra air the car is now pulling in cause this?
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