D1-154 Girodisc Porsche 410mm Front Replacement Rings

Refresh your Porsche’s braking system with Girodisc D1-154 410mm front replacement rings. These precision-engineered rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Each rotor ring is machined from Girodisc’s proprietary high-carbon cast iron, ensuring exceptional heat resistance, consistent friction, and fade-free braking through repeated track sessions or spirited road use.

Vehicle Fitment

Compatible with:
• Porsche 991 GT3 / GT3 RS (2014–2019)
• Porsche 991 Turbo / Turbo S (2014–2019)
• Porsche 992 GT3 (Iron conversion applications)

Note: Designed for Girodisc 410mm two-piece front rotor systems. Not compatible with OEM PCCB carbon-ceramic discs or one-piece factory iron rotors.

Features

• Sold as a left/right pair with complete floating hardware kit
• Direct replacements for Girodisc 410mm two-piece front rotors
• High-carbon iron construction provides excellent thermal stability and long wear life
• Directional curved vanes increase airflow and cooling efficiency under sustained braking
• Maintains factory brake bias, ABS, and stability control calibration
• Precision-balanced for smooth and consistent performance
• Designed exclusively for Girodisc aluminum hats used in Porsche iron-conversion kits

Specifications

• Diameter: 410 mm
• Position: Front
• Material: High-carbon cast iron
• Mount type: Floating two-piece system
• Includes: Two rotor rings and new hardware kit
• Sold/priced per pair

Girodisc D1-154 Porsche 410mm Front Replacement Ring FAQs

Can these be used with OEM Porsche carbon-ceramic hardware? No. The D1-154 rings are specifically for Girodisc iron conversion hats and cannot mount to PCCB carbon-ceramic assemblies.

What pad compounds work best with these rotors? For dual street/track use, Pagid RS29 or Ferodo DS1.11 are recommended. For daily use, choose low-dust compounds like Ferodo DS2500 or Hawk HPS 5.0.

What torque should I apply to the hardware bolts? Torque each bolt to 12 ft-lbs (16 Nm) using blue Loctite. After one full heat cycle, verify all fasteners are secure.

Are these rotors directional? Yes. Each rotor is marked for left or right installation. Follow the rotation arrows to ensure proper airflow through the curved vane structure for optimal cooling.

Upgrade your Porsche’s braking confidence with Girodisc D1-154 410mm front replacement rings — precision-crafted for heat control, consistency, and race-proven performance lap after lap.