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Old 08-25-2012, 08:34 AM   #3
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
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I have used these, but only on a race car. Exact placement of these is critical, and not always possible on a street car, plus they only generate vacuum at high exhaust flow rates making it useless on the street.

Ifyou want to go to a catch can, you will need to add a belt driven vacuum pump so that you get better vacuum at low to mid RPM's; several companies such as Moroso make them.
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