The Girodisc PCCB Front Iron Rotor Conversion is a track-proven 2-piece rotor upgrade designed for Porsche 991 GT3, GT3 RS, GT2 RS, and 718 GT4 RS models equipped with factory PCCB carbon-ceramic brakes. This system replaces expensive OEM ceramic rotors with high-performance cast iron discs and lightweight aluminum hats, delivering improved braking consistency, better heat management, and significantly reduced long-term operating costs. Engineered as a direct bolt-on solution, it retains factory calipers, ABS calibration, and brake bias while dramatically improving durability for aggressive street and track use.
Fits Porsche 991.1 / 991.2 GT3, GT3 RS, GT2 RS with factory PCCB
Also compatible with 718 Cayman GT4 RS (PCCB-equipped)
Direct replacement for OEM front PCCB rotors — no modifications required
Requires use of 991 GT3 iron rotor pad shape (smaller annulus vs PCCB pads)
Maintains OEM calipers, ABS function, and brake bias
Pair of 2-piece front floating rotors (left & right)
6061-T6 aluminum rotor hats (pre-assembled)
High-strength alloy steel drive pins and mounting hardware
Pre-assembled floating hardware with anti-noise spring washers
Rotor type: 2-piece floating iron rotor conversion
Material (disc): Proprietary cast iron alloy
Material (hat): CNC-machined 6061-T6 aluminum
Design: Curved vane internal cooling (centrifugal airflow design)
Mounting: Floating system with 12 high-strength drive pins
Rotor size: ~410mm front (PCCB equivalent sizing)
Serviceability: Replaceable rotor rings (reuse hats)
Sold as: Pair (front axle)
Direct PCCB replacement: Bolts on with no modification while retaining OEM braking systems and geometry.
Improved heat management: Cast iron and curved vane design dramatically improve cooling and reduce brake fade under repeated high-load braking.
Floating rotor design: Allows axial/radial movement to reduce stress, improve pedal feel, and prevent cracking under heat cycling.
Lower operating cost: Iron rings are inexpensive to replace vs costly PCCB rotor replacement.
Better pad compatibility: Uses smaller iron pad shape, unlocking significantly more pad compound options for track and street.
Balanced performance: Maintains factory brake bias and ABS efficiency without requiring a full big brake kit.
!