The S58 is receptive to tuning (JB4 piggyback, BM3/custom, flex-fuel E50/E85), but the F80-carryover manual clutch and transmission cap headroom past ~600 wtq without an aftermarket clutch kit, and sellers frequently emphasize stock/untuned status.
S58 tuning headroom and clutch/trans limits
BMW G80 M3 (2021-2026) · mechanical