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Moderator
Join Date: Dec 2007
Location: Sunny San Diego
Posts: 9,025
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Isn't there a 1-way valve back there so pressure doesn't feed back to the Diverter Valve? Just wondering as this may be my source of air noise upon acceleration.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior
1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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