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I went from MPPSK to BM3 Stage1 91Oct a few months ago.
What I love about it most is it's really very smooth, no weird / jerky shifts, no hesitation in power delivery. I am very happy with it.
As for performance , it's not a night and day difference after MPPSK but added power is easily felt. Car is noticeably faster and stronger in every rpm. Much more fun to drive now.
Stage 2 93Oct must be crazy fun but I have no intention to install a new downpipe and I don't have access to high quality gas.
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G30 540i xDrive M Sport MPPSK / BM3 |