This is the Michelin Pilot Sport S 5 K1, a high-performance summer tyre in a Ferrari-approved specification.
- K1: Ferrari homologation marking, not Tesla-specific.
- 103 load index: 875 kg per tyre under specified conditions.
- (Y) speed rating: above 300 km/h, subject to Michelin’s operating limits.
- XL: Extra Load construction.
- This K1 version is not listed as Acoustic, unlike the AML [ACU] version you checked.
The exact version, Michelin product code 887964, has EU ratings of fuel efficiency C, wet grip B and external rolling noise 73 dB, noise class B.