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Old 12-08-2012, 10:09 AM   #112
ElRod's Avatar
Joined: Jun 2008
Location: North Texas
Oddometer: 296
One of the reasons for a PCV valve, in that it is one way is so that in the event of a backfire through the intake tract it doesn't blow back into the crankcase. Being outside the airbox should be of no consequence in that regard. However, without it you could ingest water, but being at the same level as the throttle bodies I see no benefit. If I were planning on doing a lot of water crossings I'd stay with the stock airbox.
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