Girodisc Porsche 380mm Rear Rings
The Girodisc D2-146 rear replacement rings are designed as direct-fit replacements for the 380mm Girodisc two-piece rotor system on Porsche 991 and 992 GT3 models. Each set includes left and right rings plus all new floating hardware required for installation, allowing you to restore your braking performance without replacing the full rotor assembly.
Vehicle Fitment
Compatible with:
• Porsche 991 GT3 / GT3 RS (rear, 380mm Girodisc two-piece rotors)
• Porsche 992 GT3 / GT3 RS (rear, 380mm Girodisc two-piece rotors)
Note: For use only with Girodisc two-piece rotor systems. Not compatible with OEM or PCCB rotors.
Features
• Sold as a left/right pair and includes new floating hardware
• Direct replacements for Girodisc 380mm two-piece rear rotors
• Precision CNC-machined from high-carbon cast iron
• 48 curved directional vanes improve airflow and heat management
• Maintains factory brake bias and ABS calibration
• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 380mm
• Position: Rear
• Material: High-carbon cast iron
• Mount type: Floating two-piece system
• Includes: Two rings and new hardware kit
• Sold/priced per pair
Girodisc D2-146 Replacement Ring FAQs
Will these fit OEM Porsche rotors? No. These rings are engineered for Girodisc two-piece rotor systems only and are not compatible with OEM or PCCB setups.
Are both sides included? Yes. The D2-146 kit includes both left and right replacement rings along with new floating hardware.
Why replace just the rings instead of the full rotor? It saves cost and allows you to retain your Girodisc hats while restoring full braking performance.
Do I need to use the new hardware? Yes. Each set includes new hardware that must be used to ensure proper fitment, torque, and reliability.
Upgrade your Porsche’s braking performance with Girodisc D2-146 rear replacement rings — engineered for precision, durability, and fade-free performance on both road and track.
