Has anyone since been down this road? I might be willing to guinea pig the N53 euro headers. Got a friend that does work like this on the side.
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'08 E91 328xi N52 6MT / 3-stage mani / Euro intake / Magnaflow cat-back / AA tune / BMS clutch stop / mCDV / Plasti-dip kidneys ///Goes like it did at sea level
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