It's that loud? You recirculated the wastegates, right? Your description sounds more like open dumps. My experience with the FI 3" was the exact opposite. Mine is catted, but that's not going to result in that much of a difference. The shop that installed mt kit also reported fitment issues with the GTM stuff, but nothing some tweaking didn't fix. GTM is always going to blame the other guy.
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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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