A wideband is an oxygen sensor. It's what's on the other end of the AFR gauge. You could choose to run a vacuum block, but you'll likely still have to tap the manifold for the "in" to the vacuum block. You've got to get a pressure reading from somewhere. The block is just a cleaner way to run the vacuum lines so you don't have a bunch of T fittings everywhere.
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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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