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      05-12-2013, 09:16 AM   #5
sylonien
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Drives: M3
Join Date: Apr 2012
Location: Over there

Posts: 1,215
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My x-pipe has been chopped and welded with straight pipes
so I can't do a swap.

No negligible difference in fuel consumptino.
Still around 17-23mpg like before.

16 l/100km to 12 l/100km.

I guess people's still get occasional pops with oem and mine is more extreme with the secondary cat removed.
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