That won't be an upgrade. Skip that one and buy an aftermarket cat back if you're just after sound, or buy other parts since the OEM Nismo exhaust is pretty good and there won't be a huge difference in power from upgrading.
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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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