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Old 12-09-2012, 03:54 PM   #6
klapp14
Scooby Specialist
 
Member#: 172064
Join Date: Feb 2008
Chapter/Region: MWSOC
Location: Mchenry illinois
Vehicle:
2009 WRX
DGM

Default

I've done some searching but couldn't find a solid answer, do I need a tune to run a catback? Some say yes, and some say no because it isn't effecting air/fuel into the motor. Just thought I would get an answer before I make the purchase, id rather have the AP first.
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