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Registered
Join Date: Jul 2000
Location: Plymouth, MN, USA
Posts: 1,248
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The area where the air filter sits is not technically the "air box". The air box is the enclosed area under this that sits between the throttle body and the intake runners. It's pressure in this area caused by an intake backfire that gets vented through the pop-off valve into the area where the air filter sits.
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Bill Krause
We don't wonder where we're going or remember where we've been.
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