Instructions on the manufacturer's certificate for approved winter tires, wheels, and snow chains.
Porsche technical service bulletin No. 74-21 for 2006-2008 Porsche 911 (997).
- Bulletin number
- No. 74-21
- Component
- Tires
- Summary
- Instructions on the manufacturer's certificate for approved winter tires, wheels, and snow chains.
Vehicles covered
- Porsche 911 (997) 2006-2008 200620072008
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