Thread: 2010 WRX Cat Back Exhaust by Ultrex
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Old 09-03-2016, 10:57 PM
d_guido d_guido is offline
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Quote:
Originally Posted by nick73 View Post
Changing the catback alone can cause the G3 wrx/STi's to run lean without a tune.
sounds good! thank you so much for the reply guys!
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