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September 16, 2025 Service bulletin

Installation and conversion instructions for information on measuring the wheel system (manthey)

Porsche technical service bulletin No. 14-21 for 2012-2016, 2018-2019, 2021-2025 Porsche 911 GT3, 2016, 2019, 2023-2024 Porsche 911 Gt3 RS and 2016, 2020-2023 Porsche Cayman Gt4 and others.

Bulletin number
No. 14-21
Component
Wheels
Summary
Installation and conversion instructions for information on measuring the wheel system (manthey)

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