Don't buy the intake if you're going FI. You'll just be wasting money. If you're going FI, set your power goals and work backwards from there. Don't skimp on the supporting mods, and don't forget to account for install costs. $15-20k is about what you need for the kit+supporting mods+install+tune with a little left over for things like springs, sways, etc.
If you didn't buy the sport package for some reason, add a real diff in there too.
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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent
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