Each mode will lean the car out some but not too much till you have all bolt ons. The leaning out will help you gain some power but once you have the CAI, HFC, CBE you will need atune to get you out of being too lean and back to proper settings. CAI and CBE will lean you out a bit but not enough to worry about it.
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2010 LS3 C6 Silver coupe corvette
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