According to the post, the submission was first presented in January for CSL variants of the M1, M2, M3, M4, M5, M7, M6 and M8, while the second was submitted in the United Sates in April, but only for the M2, M4 and M8.
The latest news comes after BMW M Division Head, Frank van Meel, told US publication Road & Track that the CSL would replace the GTS as BMW's flagship performance nomenclature, while the CS designation will slot in below.
In addition, CS application have also been filed from M1 or M8, although like the CSL, it remains to be seen whether some models, particularly the M1 and M7, will make it into production.
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