The problem with a 3" intake is the bottleneck at the throttle body. I'm sure these would show gains if you hog out the entire intake tract and then tune for it. Otherwise I can't see them doing much beyond a standard diameter CAI.
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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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