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Old 07-16-2006, 11:26 PM   #12
Scooby Specialist
Member#: 70532
Join Date: Sep 2004
2004 WRX


I dont believe the APS is. I have read numerous posts about how difficult it was to get a good protune with the APS intake, but it can be done. So my best guess is that you would definitely want a protune in order to run that.
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