The external gates will always be a better option. They may not be necessary, but they give much better boost control. As far as the exhaust goes, it's not the FI catback that's loud. It's the open dumps. Get them recirculated into the exhaust and it will be nice and quiet. Open dumps scream. It's pretty cool for a toy car, but it would get old quick on a car you drive often.
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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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