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I finally purchased my 2011 SS Convertible. Limited amount of cash to start on the upgrades. What would be the best for the money, Cold air or axle back exhaust?
For an auto, my suggestion is to go with the axle back first. When my 2010 w/L99 was stock, very little gains were made with a CAI (sometimes, it lost power).
you can do the axleback and also add a KN filter they are around 50 or 60$ its worth a shot I saw some gains in my TBSS when I added a KN filter
Good luck