pistonsmccoy Posted November 2, 2015 Share Posted November 2, 2015 First off is the ECU tunable? also if I am only doing a axleback(only muffler change) and a CAI will I need a retune? I have had a few turbo Subies and I know they all like to be tuned for everything lol. any help is appreciated! Link to comment Share on other sites More sharing options...
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