I had the manifolds, downpipes and hot sides of the turbo ceramic coated. I couldn't tell you how effective it is, since these cars run hot anyway and I have nothing to compare it to. It wasn't too expensive. I'd do it if you have the choice.
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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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