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Admittedly, I just have an si, but I opted for the AA and am pleased. I mainly did so based on price and I wanted a reflash, not a piggy back. The piggy backs are cheaper, but I have not heard as many good things about the piggy backs. FWIW.
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2015 Audi SQ5
RECENT PAST
2013 Porsche Boxster S
2009 335i/Coupe/Dinan S3
2006 BMW Z4 3.0si
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