This part is listed by BMW as BMW part number 11127853937 (11-12-7-853-937) and is described as Genuine BMW Head Bolt Set for S55 Engine on F87 M2 Competition, M2 CS (2019-2021), F80 M3 (2015-2018), and F82/F83 M4 (2016-2021).
Supersedes the following obsolete BMW part numbers:
11127535950 (11-12-7-535-950)
11127535949 (11-12-7-535-949)
11127570159 (11-12-7-570-159)
This is a Genuine BMW part with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.
BMW Fitments:
2 Series
F87 (2016-2021) > M2 CS Racing
F87 (2016-2021) > M2 Competition S55 (2019+)
3 Series
F80 (2015-2018) > M3 (2015-2018)
4 Series
F82 / F83 (2015-2020) > M4 (2015-2020)
F82 / F83 (2015-2020) > M4 GTS
