Well I do not kno if it has a different flywheel since I've only had it 3 months.. and yes I am running straight piped but the weird part is its better with the straight piped (doesn't stall) and with the stock muffler set up, it does stall or the fluctuations are worse.
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3 pedal 2001 325i
. So Far: Tint, Black suede interior, Straight pipe after cat, Regular maintenance,
And WAY more to come!