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Old 05-08-2013, 12:15 AM   #45
Wilson_51's Avatar
Drives: 2010 Lt Camaro
Join Date: Apr 2013
Location: Arkansas
Posts: 47
Originally Posted by Apex Chase View Post
Single valve is for naturally aspirated applications, dual is for forced inductions. Without launching into a full blown tech article, the filter cap basically helps the catch can do its job better.
By "forced induction" do you mean like a turbo? Or something as simple as a CAI?
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