D1-122 Girodisc Porsche Front Rings
Maintain your Porsche’s precision braking feel with Girodisc D1-122 340mm front replacement rings. Designed to bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit, these rings provide OEM fitment with track-proven performance. Each rotor ring is CNC-machined from Girodisc’s proprietary high-carbon cast iron, offering exceptional heat management, reduced unsprung weight, and improved consistency under demanding driving conditions.
Vehicle Fitment
Compatible with:
• Porsche 991.1 Carrera S (2012–2016)
• Porsche 991.1 Carrera 4S (2012–2016)
• Porsche 991.1 Carrera GTS (2014–2016)
Note: Designed exclusively for Girodisc 340mm two-piece front rotor systems. Not compatible with OEM one-piece or PCCB carbon-ceramic rotors.
Features
• Sold as a left/right pair with complete floating hardware kit
• Direct replacements for Girodisc 340mm two-piece front rotors
• High-carbon iron alloy ensures stable friction and long-term durability
• Directional curved vanes optimize cooling airflow and reduce rotor temperatures
• Maintains factory brake bias, ABS, and stability control calibration
• Precision-balanced to eliminate vibration and ensure smooth braking
• Designed exclusively for Girodisc aluminum hats
Specifications
• Diameter: 340 mm
• Position: Front
• Material: High-carbon cast iron
• Mount type: Floating two-piece system
• Includes: Two rotor rings and complete hardware kit
• Sold/priced per pair
Girodisc D1-122 Porsche Front Replacement Ring FAQs
Can these be used with OEM Porsche rotor hats? No. These rings are engineered specifically for Girodisc aluminum hats and will not fit OEM one-piece or PCCB systems.
Which brake pad compounds are recommended? For street and occasional track driving, Pagid RS29 or Ferodo DS2500 pads are excellent choices. For full track use, use higher-friction compounds such as Pagid RSL1.
What torque specification is required for the hardware? Torque each bolt to 12 ft-lbs (16 Nm) with blue Loctite, then recheck after one full heat cycle for proper seating.
Are these rotors directional? Yes. Each rotor is marked for left or right installation to ensure proper airflow through the curved internal vanes, maximizing cooling efficiency.
Upgrade your Porsche 991.1 Carrera’s braking performance with Girodisc D1-122 340mm front replacement rings — designed for heat control, balance, and endurance from road to track.
