Girodisc Porsche 991, 992 GT3, GT2 RS, GT4 RS PCCB Rear Iron Rotor Conversion
Upgrade your Porsche’s carbon-ceramic braking system with Girodisc’s precision-engineered iron rotor conversion. Designed as a direct replacement for OEM PCCB rear rotors, this setup provides improved heat management, reduced long-term costs, and more consistent braking performance under aggressive driving and track conditions.
Vehicle Fitment
Porsche 911 GT3 (991.1, 991.2, and 992)
Porsche 911 GT3 Touring (991 & 992)
Porsche 911 GT3 RS (991.1 & 991.2)
Porsche 911 GT2 RS (991.2)
Porsche 718 Cayman GT4 RS (2022–present)
Compatible with OEM PCCB carbon-ceramic brake systems and factory Brembo calipers.
Direct Iron Replacement for Porsche PCCB Rotors
The Girodisc system bolts directly to factory hubs and calipers with no modifications required. Each rotor features a U.S.-sourced 6061-T6 aluminum hat and Girodisc’s proprietary high-carbon cast-iron friction rings. The floating two-piece design allows thermal expansion without warping, maintaining consistent pad contact and pedal feel. Curved internal vanes act as centrifugal pumps to draw cooling air through the rotor for superior temperature control under repeated hard braking.
Features
• Direct replacement for OEM PCCB rear rotors – no modifications required
• Billet 6061-T6 aluminum hats with hard-anodized finish
• Proprietary high-carbon cast-iron rings cast and machined in the USA
• Floating mount system with 12 cadmium-plated steel drive pins
• Anti-noise spring washers prevent rattle while maintaining float
• Curved vane design improves airflow and cooling
• Fully rebuildable—replace only the iron rings when worn
• Sold/priced per pair
Girodisc A2-154 Rear Rotor FAQs:
Can I install these without altering the PCCB calipers? Yes. This Girodisc system bolts directly to the OEM hubs and reuses the factory PCCB calipers and hardware—no adapters or spacers needed.
Why switch from carbon-ceramic to iron rotors? Iron rotors provide more consistent performance under heat, better pedal feedback, and dramatically lower maintenance costs for frequent track use.
Will these affect the car’s ABS or stability control systems? No. Girodisc rotors match OEM dimensions and weight distribution, maintaining full compatibility with Porsche’s electronic systems.
Are these suitable for extended track sessions? Absolutely. Girodisc rotors deliver predictable braking feel and exceptional thermal stability during long, high-load track events when paired with performance pads and fluid.
Upgrade your Porsche’s PCCB system with Girodisc’s rear iron rotor conversion—engineered for the perfect blend of control, serviceability, and motorsport-grade performance.
