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I'm also considering the Dinan tune for my M550i.
Does the exhaust ad much to the power or is it mostly for sound? If I end up and prefer the sound of a competitive exhaust A/C Snitzer, etc), would that be a problem with the tune?
Not to get off topic, but how much stiffer is the suspension upgrade?
And would going non RFT PS4S offset that? I've got the Goodyear F1 RFT.
I don't want to lose the good ride of the stock M550i but want it a bit tighter on sporting drives and on track.
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2020 X3M non-comp, Alpine White over black : Exec Pkg, ventilated M Sport seats, 20"s
2020 M2 Comp, Sunset Orange/Blk: Orange stitching, DCT, exec pkg, bicolor rims
Gone '18 M550i, '16 X4 M40i, '15 M5, '13 X3 35i, '12 335is, '11 X5 50i, '09 Z4 35i, '08 550i, 06 X3, 06 650i, '02 M5, '99 540i
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