I am very interested in the CAI, specifically if it provides real world gains. I debated the other modifications past the Stage 2 flash but they seem to have fairly minimal returns for the extra dollar (although the exhause does certainly sound better than stock).

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Current: 2012 M-Sport 550i X-drive Dinan Stage 2

Gone but not forgotten: 2007 911 Turbo, 2005 911 Carrera S, 07 BMW M Coupe, 07 335 XI, 05 Mercedes R500