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Old 10-16-2013, 12:24 PM   #58
Crystal_Imprezav
Scooby Specialist
 
Member#: 84105
Join Date: Mar 2005
Chapter/Region: SCIC
Location: I'm a Newbie
Vehicle:
2005 Super Slow STi
CGM

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I used a moroso check valve breifly but when it is hooked up to a Pertson, you don't need a check valve bc any BP that may happen will vent through the Peterson filter.

If you use a check valve and your exhaust builds BP and the valve closes, you could have serious issues since your CC will essentially be capped (if using a one can system).
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