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      08-21-2017, 08:38 PM   #5
xQx
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Drives: 2008 BMW 135i (E88 N54 6AT)
Join Date: Aug 2016
Location: Sunshine Coast QLD Australia

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Following.

My plan is to do something very similar, but as a quad exhaust setup.

IE: leave the OEM location exhaust outlet stock standard, but have the right-hand outlets connected back to Y splitter at the midpipes (straight piped) and controlled by an inline electronic butterfly.
Appreciate 0