Unless you have an LSD as noted, don't do the rear sway. You will be worse off in turns. The inside wheel gets nearly all of the power in a tight turn because of that open differential; a thicker rear sway will actually lessen the grip and you'll have even less 'push' going through.
FYI rear sway = drop the subframe, which is very expensive. Do it at the same time as LSD + subframe brushings.
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2024 BMW M3 Sedan Frozen Pure Grey II/Fjord Blue, 6MT
Past: 2021 Z4 M40i Frozen Grey II/Black Alcantara | 2017 F30 340i Mineral Gray/Coral Red, 6MT | 2011 E92 335i Le Mans Blue/Black, 6MT
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